Geophysical Information
U.S. Geological Society/ NOAA National Centers for Environmental Information
Drill Stem Specifications and Inspection
T.H. Hill Associates Inc [DS1]
Fearnley Procter Group [NS1/ NS2]
Professional Societies
Industry Steering Committee on Wellbore Survey Accuracy
Society of Petroleum Engineers
Society of Petrophysicists and Well Log Analysts
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