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The following parties have purchased one or more Rayfract® license(s) each :


A.I.G. Associazione per Indagini Geognostiche / Italy

A.M.A SOIL MAROC SARL / Morocco

A.R.S. geologica s.n.c. , Italy

Academia Sinica , Taipei / Taiwan

Advanced Geoscience, Inc. , Palos Verdes Estates / California U.S.A.

ÅF AB , Stockholm / Sweden

AguaEx SpA, Santiago / Chile

Aimil Ltd. , New Delhi / India

Studio Progea di Geol. Sergio Aicardi / Italy

Dott. Paolo Airaldi / Italy

Akron Srl , Bovisio Masciago (Mi) / Italy

Dott. Geol. Diego Albini / Italy

Dott. Vincenzo D'Amico / Italy

Análysis y Gestión del Subsuelo , Madrid / Spain

Dott. Geol. Matteo Angiolini / Italy

Antea Group , Olivet Cedex / France

Dott. Geol. Francesco Aparo / Italy

Apollo Geophysics , Bellingham / Washington U.S.A.

Apoterra Seismic Processing Ltd., Calgary / Alberta Canada

ARCE GEOFÍSICOS , Lima / Perú

Ardara International Limited , Muscat / Sultanate of Oman

Atlante s.r.l. , Firenze / Italy

Dott. Aldo Ambrogio / Italy

Dott. Antonino Ardagna / Italy

Aureli Soil s.n.c. , Gioia Dei Marsi (AQ) / Italy

Dott. Vincenzo Bacciocchi / Italy

Institute of Technology Bandung , Bandung / Indonesia

Dott. Domenico Barani / Italy

Geoindagini snc di Barone Giovanni e Giannascoli Giuseppe / Italy

Studio Tecnico Associato Consulenze di Geologia ed Ambiente del Dott. Geol. F. Barbieri e del Dott. Geol. M. Ropa / Italy

Studio Dr. Silvano Becattelli , Poggibonsi (Si) / Italy

SC BELEVION IMPEX SRL , Bucharest / Romania

Alexandre Belousov , Moscow / Russia

Studio di Geologia-Geofisica Dott. Geol. Alessandro Benedetto / Italy

Dott. Giovanni Bertagnin / Italy

Dott. Francesco Bianco / Italy

BIERREGI srl / Italy

Boise State University , Boise / Idaho U.S.A.

Studio Geologico Associato Pangea dei drr. Bonsignori & Bracciani / Italy

Dott. Silvio Brenna , Italy

BRGM Aménagement et Risques Naturels , Orléans / France

CI Ambiental Ltda. , Bogotá / Colombia

CSI Cable & Supplies, Inc. , Sugar Land / Texas U.S.A.

Dott. Rosario Cafà / Italy

Carlton Engineering , Shingle Springs / California U.S.A.

Dott. Giancarlo Carboni / Italy

Dott. Paolo Lo Cascio / Italy

Dott. Euplio Casullo / Italy

Centro Tecnologico del Marmol , Cehegin (Murcia) / Spain

Centrogeo Survey SNC / Italy

Dott. Alberto Chiandussi / Italy

Dott. Antonio Chianese / Italy

Civil Engineering Institute of Croatia , Zagreb / Croatia

CMG Testing s.r.l. , Mercogliano (AV) / Italy

Coffey Geosciences Pty Ltd , Sydney / NSW Australia

Comisión Federal de Electricidad , Piedras Negras / Coahuila Mexico

Consorzio di Bonifica Ionio Catanzarese , Italy

Dott. Vincenzo Cortese / Italy

COWI A/S , Kongens Lyngby / Denmark

CRESTANA S.r.l.s. , Brescia, Lombardia / Italy

DOO CTU-IPKIN , Bijeljina / Bosnia Herzegovina

Dott. Francesco Cuccurullo / Italy

Dawood Engineering, Inc. , Grantville / Philadelphia U.S.A.

Dott. Santo La Delfa / Italy

DIMMS control S.p.A , Avellino / Italy

DMT Geosciences Ltd. , Calgary / Alberta Canada

DMT Geosciences Ltd. , Vancouver / British Columbia Canada

Draig Geoscience , Perth / Western Australia

Earth Systems Southwest , Bermuda Dunes / California U.S.A.

Earth Observatory of Singapore , Singapore / Singapore

EBA Engineering Consultants Ltd , Edmonton / Alberta Canada

Ecogeo Global Service snc , Iglesias (CA) / Italy

Egis Structures et Environnement/Egis Géotechnique , Seyssins / France

Engineering Geology srl / Dr. Geol. Raffaele Nardone, Italy

Enki s.r.l. , Firenze / Italy

ENTPE, LABORATOIRE GÉNIE CIVIL ET BÂTIMENT , Vaulx en Velin / France

Environmental Geophysics Associates , Austin / Texas

Exploration Instruments, LLC , Austin / Texas U.S.A.

Studio Geologico Fiorentino, Dott. Geol. Cirri / Italy

FORREST ENVIRONMENTAL SERVICES, Inc. , Herndon / Virginia U.S.A.

Université de Fribourg , Fribourg / Switzerland

Fugro Aperio Limited , Wallingford / Oxon United Kingdom

Fugro France S.A. , Nanterre / France

Fugro Consult GmbH , Berlin / Germany

Fugro Consultants Inc. Denver , Colorado / U.S.A.

Fugro West Inc. , Ventura / California U.S.A.

G.I.G.A. , Dott. Giampaolo Marianelli / Italy

G-tec s.a. , Belgium

Gaia servizi S.n.c. , Pisa / Italy

Dott. Geol. Amedeo Gaiezza / Italy

Dott. Antonio Gambino / Italy

Gamma Geoservizi s.r.l. , Grosseto (GR) / Italy

G.A.P. CONSULTING S.A.S. , Castrovillari (CS) / Italy

Gasch & Associates , Rancho Cordova / California U.S.A.

GBG Australia Pty Ltd , North Parramatta / NSW Australia

GEA - geologia ecologia ambiente s.r.l. , Ivrea (TO) / Italy

GECO snc di Curatolo A. e Gaggiotti M. , Falconara Marittima (AN) / Italy

Gehrig, Inc. , Muenster / Texas U.S.A.

GEO 3D srl , Rieti (RI) / Italy

GEO.AP s.n.c. , Perugia / Italy

Geo Environmental Engineering di Lorenzini e Martinelli s.n.c. / Italy

Geo & Geo Cia. Ltda. , Cuenca / Ecuador

Geo Gav srl , Favara (Ag) / Italy

Geo Group s.r.l. , Modena / Italy

GEO.SAL. S.A.S. di Umberto Borgia & C. / Italy

Geo Sicilia / Italy

Geo3, Brixen / Italy

GEO4 GmbH , Oberbrunn / Bayern Germany

GEO ANALYSIS snc , Bressanone / Italy

GEOÁREA Consultores de Geotecnia e Ambiente , Linda-a-Velha / Portugal

GeoArchaeo RESEARCH s.n.c. / Italy

GEO CONSULT S.A. , Panama City / Panama

GEOCUBA , La Habana / Cuba

GEODRILL s.r.o , Brno / Czech Republic

GeoE-Tech Ltda. , Santiago / Chile

GeoEcho s.n.c. , Poggibonsi (SI) / Italy

Geoesplorazioni di Pietro Lorenzo / Dott. Pietro Lorenzo, Italy

GeoExpert ag , Schwerzenbach / Switzerland

GEOEXPLOR S.R.L. , Lima / Peru

GEOEXPLORER S.R.L. , Falconara Marittima (Ancona) / Italy

Geoexploring Soc. Coop. , Francavilla al Mare (Ch) / Italy

geoFact GmbH , Bonn / Germany

Geofísica Aplicada Consultores S.L. , Torrelodones (Madrid) / Spain

Geofisica Misure s.n.c. , Trebisacce (CS) / Italy

Geofisica Toscana , Firenze / Italy

Geognostica Apuana s.n.c., Massa (MS) / Italy

Geohidra Consultores C.A. , Caracas / Venezuela

Studio Tecnico GEOIDEA di Bonini Marcello , Moncalieri (TO) / Italy

Geoin s.r.l. , Firenze / Italy

Geoinzeniring d.o.o. , Ljubljana / Slovenia

GEOLAGS , Cosoleto (RC) / Italy

GEOLITHE , Grenoble / France

Geo Log Data SRL , Buzau / Romania

Geological, Geotechnical & Earthquake Engineering S.R.L. , L'Aquila / Italy

GEOMA di Massimiliano Marzupini / Italy

Geomerid S.r.l. , Siracusa / Italy

GEOPROSPECTOR S.r.l. , Bari / Italy

Geological Survey of Norway , Trondheim / Norway

Geomatrix PLC , Addis Ababa / Ethiopia

Geophysical Exploration & Consulting S.A. , Godoy Cruz / Argentina

Geophysik und Geotechnik Leipzig GmbH , Leipzig / Germany

GEOPROVE s.a.s. / Italy

GEORES Studio Tecnico Associato / Italy

GEORISORSE ITALIA Sas , Sinalunga (Siena) / Italy

GeoRock s.n.c. , Spiazzo (TN) / Italy

Georys Ingenieros S.A.C. , Lima / Peru

GEOS GEOFISICA S.N.C. , Jesi (AN) / Italy

GEOS - Prospezioni Geofisiche , Castrovillari (CS) / Italy

Geos del Geol. Francesco Messina / Catania, Italy

Geosciences Co. Ltd, JenPo-Dong, Jin Ku / Busan South Korea

Geosecure today S.A.G.I. srl / Italy

Geosinergy sas , Taurianova (RC) / Italy

GEOSOIL CÍA. LTDA. , Quito / Ecuador

Geostudi Astier S.r.l. , Livorno / Italy

GeoSurveys , Aveiro / Portugal

Geotecnia Patagonia , Punta Arenas / Chile

Geotech Associates , Republic of Trinidad and Tobago

Geotech Sp z o.o. , Rzeszów, Poland

Geotechnology, Inc. , St. Louis / Missouri U.S.A.

GEOTER s.n.c. , Paternò (CT) / Italy

GEOTEST AG , Zurich / Switzerland

GEOTEST s.a.s , Melfi (PZ) / Italy

GEOtest, a.s. , Brno / Czech Republic

Geotirreno S.r.l. , Massa / Italy

Geotiber Srl , Roma / Italy

Gester S.a.S. , Genova / Italy

Geovertical S.r.l. , Catania / Italy

GEOVision Inc. , Corona / California U.S.A.

GeoVista AB , Luleå / Sweden

GeoWelt S.a.s. , Pozzuoli (NA) / Italy

Geozone Asesores S.L. , Paterna / Valencia Spain

GF Instruments s.r.o , Brno / Czech Republic

GG Service sas, Dr. Tomas Garbari / Italy

GGM S.r.l. , Città Sant’Angelo (PE) / Italy

GHD , Brisbane / Queensland Australia

GHD , Melbourne / Victoria Australia

Ghea s.r.l. , Ragusa / Italy

Giamberardino s.r.l. / Italy

Dott. Geol. Dario Gioia / Italy

Dott. Giorgio De Giorgio / Italy

Dott. Nicola Giovannini / Italy

GMAS Ltda. , Bogotá / Colombia

Golder Associates , Calgary / Alberta Canada

Golder Associates Pty Ltd , Milton / Queensland Australia

Grupo Dragados , Madrid / Spain

GS Ingeniería geofísica S.L. , Barcelona / Spain

Dott. Matteo Gualdani / Italy

Dott. Giuseppe Gugliuzza / Italy

Guyana Goldfields Inc. , Toronto / Ontario Canada

Hayles GeoScience Surveys Ltd. , Beausejour / Manitoba Canada

Hasbrouck Geophysics, Inc. , Montrose / Colorado U.S.A.

HDR, Englewood / Colorado U.S.A.

Hector Hinojosa , Munich / Germany

The Hutchinson Group, Ltd. , Murrysville / Pennsylvania U.S.A.

i.Geo snc , Bresso (Milano) / Italy

IGeA Studio Geologico , Borgo San Lorenzo (Firenze) / Italy

KUMPULAN IKRAM (SABAH) SDN BHD , Kota Kinabalu, Sabah / Malaysia

Ikram Engineering Services Sdn Bhd. , Kajang / Selangor Malaysia

Illinois State University , Normal / Illinois U.S.A.

IM2 S.A. , Santiago / Chile

IMC Geophysics International Ltd. , Alfreton / Derbyshire United Kingdom

I.M.G.A. s.a.s. , Favara (AG) / Italy

Indian School of Mines, Dhanbad / Jharkhand, India

Industrial Technology Research Institute , Taiwan

INEMA Ingenieros Asesores, S.L. , Valencia / Spain

Ingegneria & Controlli Italia S.r.l. , Torino / Italy

Dott. Geol. Luigi Innocenzo Pedace , Rossano (CS) / Italy

INSET s.r.o. , Prague / Czech Republic

Institut Geològic de Catalunya (IGC) , Barcelona / Spain

Institute of Rock Structure and Mechanics of the ASCR , Prague / Czech Republic

Istituto Nazionale di Geofisica e Vulcanologia , Roma / Italy

I.G.T. International Geophysical Technology S.A. , Madrid / Spain

IMG srl , Italy

Dott. Alberto Iotti, Macherio (Milano) / Italy

IPIN DOO , Bijeljina / Bosnia and Herzegovina

Istituto Superiore per la Protezione e la Ricerca Ambientale , Rome / Italy

JUP Istrazivanje i razvoj doo , Belgrade / Serbia

JOANNEUM RESEARCH , Leoben / Austria

JP-Fintact , Vantaa / Finland

K-UTEC AG Salt Technologies , Sondershausen / Germany

University of Kassel , Kassel / Germany

KIGAM Korean Institute of Geoscience and Mineral Resources , Yuseong-gu, Daejeon / South Korea

King Abdulaziz University , Jeddah / Saudi Arabia

Komex International Ltd. , Calgary / Alberta Canada

Kongju National University , Kongju / South Korea

Kreade-Inno S.r.l. , Italy

Laboratoire Public d'Essais et d'Études , Casablanca / Morocco

Laboratorio de Ingenieros del Ejército , Madrid / Spain

Laboratório Nacional de Engenharia Civil , Lisboa / Portugal

Laboratorio Terre s.a.s. di Rocco Porsia , Matera / Italy

University of Nevada, Las Vegas, Applied Geophysics Center , Las Vegas / Nevada U.S.A.

Dott. Daniele Lisi / Italy

Dott. Geologo Giuseppe Locoratolo / Italy

Dott. Giorgio Lombardi / Italy

Patricio Ludeña, Quito / Ecuador

Universidad Complutense de Madrid , Madrid / Spain

Dott. Riccardo Mari / Italy

Marine & Earth Sciences Pty. Ltd. , Hawthorn / Victoria Australia

Dott. Geol. Marroccoli Sante Massimiliano / Italy

Dott. Fabrizio Mazzarocchi / Italy

Dott. Geol. Andrea Melone / Italy

Dott.ssa geol. Stefania Mencacci , Montalcino / Siena, Italy

Methodo s.r.l. , Castelferreti (AN) / Italy

Studio Geologico Dott. Antonio Milano , Pompei / Napoli, Italy

Minera del Norte SA de CV. , Monclova, Coah. / Mexico

Ministry of Natural Resources , Erbil City / Kurdistan Region, Iraq

Minnesota DOT Geotechnical Engineering Section , Maplewood / Minnesota U.S.A.

Misure Geotecniche s.a.s. / Italy

MOHO d.o.o., Zagreb / Croatia

Montana Tech Geophysical Engineering , Butte / Montana U.S.A.

Montenegro Seismological Observatory , Podgorica / Montenegro

Université Montpellier, Laboratoire Géosciences Montpellier , Montpellier / France

MOTA-ENGIL, Engenharia e Construção, S.A. , Porto / Portugal

MSE Technology Applications Inc. , Butte / Montana U.S.A.

Dott. Geol. Pasquale S. Musumeci / Italy

National Center for Physical Acoustics , University / Mississippi U.S.A.

Dr. Fabio Nicita / Italy

Dott. Carmelo Antonio Nicita / Italy

National Institute of Rock Mechanics , Karnataka / India

NORCAL Geophysical Consultants Inc. , Cotati / California U.S.A.

Northwest Geophysical Associates, Inc. , Corvallis / Oregon U.S.A.

Dott. Carmelo Di Nuzzo / Italy

OCSA Prospecciones y Estudios S.L. , Madrid / Spain

Olson Engineering, Inc. , Wheat Ridge / Colorado U.S.A.

Open Ground Resources , Pretoria / South Africa

P-WAVE Geophysical Services / Italy

P3 S.N.C. DI BENVENUTI ALBERTO E CARNICELLI & C. , Pisa / Italy

Dott. Donato Palma / Italy

Palmer Geofisica s.r.l. / Italy

Dott. Giuseppe Pasquale / Italy

PBG GEOPHYSICAL EXPLORATION COMPANY LIMITED , Warsaw / Poland

PE.GA. Prospezioni Geofisiche , Lucca / Italy

Geo-Energizers snc. , Dott. Geol. Massimiliano Perini, Cascina (PI) / Italy

Dott. Roberto Perotti / Italy

Dott. Luca Piaggi / Italy

Dott. Stefano Piccioli / Italy

Pioneer Technical Services, Inc. , Butte / Montana U.S.A.

Dott. Simone Pittaluga , Imperia / Italy

Polish Geological Institute , Warsaw / Poland

Politecnico di Torino, Laboratorio di Geofisica Applicata , Torino / Italy

Polytechnic Ketapang , Ketapang / Indonesia

Polo Geologico S.n.c. , Rome / Italy

Poseidon Engineering sa / Italy

Poyry Infra GmbH , Salzburg / Austria

Dott. Geol. Antonio Priore / Italy

Progea S.r.l. , Ponte S. Pietro / Italy

PROJETTO engineering s.r.l. , Manduria (TA) / Italy

Provincia Autonoma di Trento - Servizio Geologico , Trento / Italy

PT Freeport Indonesia , Irian Jaya / Indonesia

Dott. Geol. Luciano Puddu / Italy

Studio di Geologia & Geotecnica Dott. Geol. Domenico Putrino / Italy

Quality Geosciences Company, LLC , Grantville / Philadelphia U.S.A.

Rambøll Danmark A/S , Virum / Denmark

Dott. Geol. Giovanni Ratti / Italy

Regione Friuli Venezia Giulia / Italy

Regione Toscana / Italy

Regione Umbria , Perugia / Italy

Reliable GeoInfo LLC, Katy / Texas U.S.A.

Geotecnica Ricci s.r.l. , Chieti / Italy

Rites Ltd. , India

Studio di Geologia Tecnica e Geofisica Dott. Bartolo Romaniello

Round Rock Geophysics , Round Rock / Texas U.S.A.

roXplore gmbh , Amlikon-Bissegg / Switzerland

Dr. Geol. Alessandro Schiepatti / Italy

Science Applications International , Harrisburg / Philadelphia U.S.A.

Dott. Simone Secci / Italy

SEISMOFIND LLC / Mongolia

Dott. Pio Sella / Italy

SGA GEOFISICA , Lima / Peru

GEOSGRO' di Stefano Sgrò , Dott. Stefano Sgrò / Italy

Shaw Environmental Inc. , Sacramento / California U.S.A.

Shaw Environmental Inc. , Stoughton / Massachusetts U.S.A.

Sherritt International , Calgary / Alberta Canada

S.I.A. Geognostica srl, Dott. Massimiliano Di Marino / Italy

S.I.S.M.A. geo - Prospezioni Sismiche / Italy

Dott. Mirko Sita / Italy

S.In.Ge.A S.r.l. Società Indagini Geognostiche Ed Ambientali , Montichiari (BS) / Italy

SO.GE.DI.S. s.r.l. , Senigallia (AN) / Italy

So.Ge.T. snc , Lucca / Italy

SO.IN.G. Strutture e Ambiente S.r.l. , Stagno (Livorno) / Italy

South Dakota School of Mines and Technology , Rapid City / South Dakota U.S.A.

Southern Geophysical Ltd. , Christchurch / New Zealand

Studio Associato di Geologia Tecnica GeoLab , Savona / Italy

Studio di Geologia Tecnica e Ambientale, Dott. Pierluigi di Russo / Italy

Studio Geolog , Dott. Alessandro Bianchi / Italy

Studio Geologi Associati , Terni / Italy

Studio Geologico Floreani-Jaiza, Martignacco (UD) / Italy

Studio PANGEA , Camaiore (LU) / Italy

Studio Sisma , Dott. Matteo Collareda / Italy

Studio Tecnogeo, Dott. Riccardo Triches / Italy

Subsurface Engineering SB, Selangor / Malaysia

SUBSOIL SRL , Dott. Fabrizio Giorgini, Italy

Sultan Qaboos University , Al-Khod / Sultanate of Oman

Techgea Servizi S.a.s. , Torino / Italy

TECHNO4U, Deajeon / South Korea

TECNOGEO S.N.C. , Perugia / Italy

TERRA s.r.l. / Italy

Terra Compacta j.d.o.o., Zagreb / Croatia

Terra Geosciences , Loma Linda / California U.S.A.

Ingeniería Geofísica Terra Tek Ltda. , Santiago / Chile

Dott. Geol. Emanuele Terrenzio / Italy

Zivko Terzic , Delahey / Victoria Australia

TESCO , Casablanca / Morocco

THOR Geophysical Prospection GmbH , Office Bonn / Germany

Tolunay-Wong Engineers, Inc. , Houston / Texas U.S.A.

Fabian Viteri Torres , Quito / Ecuador

Dott. Salvatore Torrisi / Italy

Tribhuvan University , Kathmandu / Nepal

Tyréns AB , Helsingborg / Sweden

U.S. Army Corps of Engineers , Sacramento / California U.S.A.

U.S. Army Corps of Engineers , Vicksburg / Mississippi U.S.A.

U.S. Bureau of Reclamation , Denver / Colorado U.S.A.

U.S. Geological Survey, Crustal Imaging & Characterization Team , Denver / Colorado U.S.A.

Universidad Nacional de Cordoba , Cordoba / Argentina

Universidad de Puerto Rico , Mayagüez / Puerto Rico

Universidad Autonoma de Aguascalientes , Aguascalientes / Ags. Mexico

Universidad Veracruzana , Boca del Rio / Veracruz Mexico

Universidad Politécnica de Madrid , Madrid / Spain

Universidade de Évora, Évora / Portugal

Universidade Técnica de Lisboa , Lisboa / Portugal

Universidade de São Paulo , São Paulo / Brazil

Universidad de Alicante , Alicante / Spain

Università di Bari Sede di Taranto Facoltà di Scienze , Italy

Università di Padova Dipartimento di Geoscienze , Padova / Italy

Università degli Studi del Sannio , Benevento / Italy

Universitat de Barcelona , Barcelona / Spain

University of Alaska Fairbanks , Fairbanks / Alaska U.S.A.

University of Cagliari, Dipartimento di Ingegneria del Territorio , Cagliari / Italy

University of Calgary , Calgary / Alberta Canada

Universidad Politécnica de Cartagena, Dpto. Ing. Minera, Geológica y Cartográfica , Cartagena / Spain

Università di Chieti , Chieti Scalo / Italy

University of Cologne , Cologne / Germany

University of Florida Civil and Coastal Engineering , Gainesville / Florida U.S.A.

Università degli Studi di Genova , Genova / Italy

University of Georgia , Atlanta / Georgia U.S.A.

University of Goeteborg, Earth Sciences Department , Goeteborg / Sweden

Universidad de Granada, Instituto Andaluz de Geofísica, Granada / Spain

University of Heidelberg, Geographisches Institut , Heidelberg / Germany

Université de Liège, Département des Géoressources, Géotechnologies et Matériaux de construction , Liège / Belgium

University of Mississippi, Geology & Geological Engineering , University / Mississippi U.S.A.

University of Muenster , Muenster / Germany

University of Mulawarman , Samarinda / Indonesia

University of New South Wales, School of Biological, Earth and Environmental Sciences , Sydney / NSW Australia

University of Tuzla , Tuzla / Bosnia and Herzegovina

Università degli Studi di Palermo , Palermo / Italy

Université Laval , Québec City / Québec Canada

Université Pierre et Marie Curie , Paris / France

University of Sriwijaya , Palembang / Indonesia

Université de Strasbourg , Strasbourg / France

University of Tennessee Knoxville , Knoxville / Tennessee U.S.A.

Dott. Eugenio Vecchio , Italy

University of Wroclaw , Wroclaw / Poland

University of Zagreb, Faculty of Civil Engineering , Zagreb / Croatia

University of Zagreb, Faculty of Geotechnical Engineering , Varazdin / Croatia

University of Zagreb, Faculty of Mining, Geology and Petroleum Engineering , Zagreb / Croatia

Studio Associato GeoSisma, Dott. Davide Villano / Italy

WorleyParsons , Calgary / Alberta Canada

XRI Geophysics, LLC , Vicksburg / Mississippi U.S.A.

Zonge Geosciences, Inc. , Sparks / Nevada U.S.A.

Dott. Geologo Zuccaro Filippo , Gravina in Puglia (BA) / Italy

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