- A Wade Nollkamper
- Adolf U Honkala
- Advance Consultants Corp
- Allan C Tucker
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- Alvin C Hope
- Alvin C Hope
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- Alvin Schultz
- America Needs America Oil
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- Andrew C Hooker
- Antle Operating Inc
- Antle Operating Inc
- Applied Biostratigraphix
- Applied Geology & Geochemistry
- Aqua Ver Inc
- Arc Group LLC
- Arc Group LLC
- Arch J Lair Consultant
- Arnjac Corp
- Associated Energy Consultants
- Auburn Energy
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- Austin Geomodeling Inc
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- Azgeo LTD
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- Balin & Assoc
- Balin & Assoc
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- Barry Halvorsen
- Bartlett Geological Conslnts
- Baugh Ronald A Geolgst
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- Ben Buongiorno
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- Bill Maloy
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- Bob Antle
- Bob Antle
- Bolden Exploration
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- Broken N Consulting Inc
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- Brooner Exploration
- Bruce Larson
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- Burtco Inc
- C P Abrassart
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- Calohan Limited
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- Cheyenne Natural Gas Co
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- Chisholm Exploration Inc
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- Clem E George
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- Consulting Geologist
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- Core Sanborn Mudlogging Inc
- Cornerstone Geotechnical Inc
- Cornerstone Geotechnical Inc
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- Craig K White Inc
- Creede LTD
- Creede LTD
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- Curry's Exploration Geologist
- D Burt Dunn
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- Delcar Inc
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- Don Marlin
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- Donald F Cardinal Geologist
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- Double G Energy
- Doug Goode
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- Dravis Geological Svc
- Dravis Geological Svc
- Drew Landes
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- E H Stork Jr & Assoc
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- Earl A Baldon
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- Edant Energy Corp
- Edman R Zink & Assoc
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- Edward's Energy Inc
- El-Can Exploration Inc
- Emerald Energy
- Enerquest Resources LLC
- Eugene Goltz
- Eugene Goltz
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- Expiraton Enterprises Inc
- F B Lacy Inc
- F B Lacy Inc
- Fargo Exploration Co
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- Faubion Exploration
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- G G Summitt Geologist
- G William Hurley
- Gaeaorama Inc
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- Geer & Assoc
- Geo Consultant
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- Geo Systems
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- Geometrix LC
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- George A Anderson III
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- Glenn Felderhoff
- Goodgame Associates
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- Goodrich Operating Co
- Goolsby Finley & Assoc LLC
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- Great Divide Consulting
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- Gus Edwards Co
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- Harrell Resources
- Harry Ptasynski
- Healex Consulting Inc
- Heath Geotechnical/Svcs
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- Hoffer Consulting Inc
- Hollis R Sullivan
- Hombre Oil Co
- Hooker Hydrocarbons
- Hooker Hydrocarbons
- Howard Exploration Inc
- Howard Exploration Inc
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- Howard W Kiatta Inc
- Hurley Geological Consulting
- Hydrogeologic/Engineering-Tx
- Inland Ocean Inc
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- Inter Science
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- Inverness Resources
- Iowa State Geology Field
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- J B Clark
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- Jack Colle & Assoc
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