APA (7th ed.) Citation

Hobbs, S. W., & Hays, W. H. (1990). Ordovician and older rocks of the Bayhorse area, Custer County, Idaho. Dept. of the Interior, U.S. Geological Survey ; Denver, CO.

Chicago Style (17th ed.) Citation

Hobbs, S. W., and William Henry Hays. Ordovician and Older Rocks of the Bayhorse Area, Custer County, Idaho. [Reston, Va.]: Dept. of the Interior, U.S. Geological Survey ; Denver, CO, 1990.

MLA (9th ed.) Citation

Hobbs, S. W., and William Henry Hays. Ordovician and Older Rocks of the Bayhorse Area, Custer County, Idaho. Dept. of the Interior, U.S. Geological Survey ; Denver, CO, 1990.