APA (7th ed.) Citation

Bastin, E. S., & Hill, J. M. (1917). Economic geology of Gilpin county and adjacent parts of Clear Creek and Boulder counties, Colorado. Department of the Interior, United States Geological Survey.

Chicago Style (17th ed.) Citation

Bastin, Edson S., and James M. Hill. Economic Geology of Gilpin County and Adjacent Parts of Clear Creek and Boulder Counties, Colorado. Washington: Department of the Interior, United States Geological Survey, 1917.

MLA (9th ed.) Citation

Bastin, Edson S., and James M. Hill. Economic Geology of Gilpin County and Adjacent Parts of Clear Creek and Boulder Counties, Colorado. Department of the Interior, United States Geological Survey, 1917.