Hail, W. J., Jr. (1977). Stewart Gulch Tongue, a new tongue of the Eocene Green River formation, Piceance Creek basin, Colorado. United States Department of the Interior, Geological Survey.
Chicago Style (17th ed.) CitationHail, William J., Jr. Stewart Gulch Tongue, a New Tongue of the Eocene Green River Formation, Piceance Creek Basin, Colorado. [Washington, D.C.]: United States Department of the Interior, Geological Survey, 1977.
MLA (9th ed.) CitationHail, William J., Jr. Stewart Gulch Tongue, a New Tongue of the Eocene Green River Formation, Piceance Creek Basin, Colorado. United States Department of the Interior, Geological Survey, 1977.
Warning: These citations may not always be 100% accurate.