APA (7th ed.) Citation

Illinois State Geological Survey, Currier, L. W., Wagner, O. E., & Hubbert, M. K. (1944). Geological and geophysical survey of fluorspar areas in Hardin County, Illinois. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Illinois State Geological Survey, Louis W. Currier, Oscar Emil Wagner, and M. King Hubbert. Geological and Geophysical Survey of Fluorspar Areas in Hardin County, Illinois. [Washington, D.C.]: United States Department of the Interior, Geological Survey, 1944.

MLA (9th ed.) Citation

Illinois State Geological Survey, et al. Geological and Geophysical Survey of Fluorspar Areas in Hardin County, Illinois. United States Department of the Interior, Geological Survey, 1944.