APA (7th ed.) Citation

Hardin, G. C., & Trace, R. D. (1959). Geology and fluorspar deposits, Big Four Fault system, Crittenden County, Kentucky. [U.S. Department of the Interior, Geological Survey].

Chicago Style (17th ed.) Citation

Hardin, George C., and Robert Denny Trace. Geology and Fluorspar Deposits, Big Four Fault System, Crittenden County, Kentucky. [Washington, D.C.]: [U.S. Department of the Interior, Geological Survey], 1959.

MLA (9th ed.) Citation

Hardin, George C., and Robert Denny Trace. Geology and Fluorspar Deposits, Big Four Fault System, Crittenden County, Kentucky. [U.S. Department of the Interior, Geological Survey], 1959.