APA (7th ed.) Citation

Keefer, W. R., & Hadley, R. F. (1976). Land and natural resource information and some potential environmental effects of surface mining of coal in the Gillette area, Wyoming. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Keefer, William R., and R. F. Hadley. Land and Natural Resource Information and Some Potential Environmental Effects of Surface Mining of Coal in the Gillette Area, Wyoming. [Reston, Virginia]: United States Department of the Interior, Geological Survey, 1976.

MLA (9th ed.) Citation

Keefer, William R., and R. F. Hadley. Land and Natural Resource Information and Some Potential Environmental Effects of Surface Mining of Coal in the Gillette Area, Wyoming. United States Department of the Interior, Geological Survey, 1976.