Online resource, PDF version; title from caption (BLM, viewed August 16, 2019).
"08/18/00."
"Information ... excerpted from an article in the June 28, 1999, edition of the Oil & Gas Journal (Volume 97, Number 26)"--Page 1
"Material ... reprinted with the permission of the publisher and the authors: Global Positioning Technologies Provide Essential Exploration Tool, Simon Corbet, Martin Rayson Quality Engineering & Survey Technology Ltd., Newcastle, U.K."--Page 1