Assessment of undiscovered oil and gas resources of the Powder River Basin Province of Wyoming and Montana, 2006 update
|Format:||Government Document Electronic eBook|
[Reston, Va.] :
U.S. Dept. of the Interior, U.S. Geological Survey,
|Series:||National assessment of oil and gas fact sheet
Fact sheet (Geological Survey (U.S.)) ; 2006-3135.