APA (7th ed.) Citation

Hatmaker, P., & Davis, H. W. (1938). The Fluorspar industry of the United States with special reference to the Illinois-Kentucky district.

Chicago Style (17th ed.) Citation

Hatmaker, Paul, and Hubert W. Davis. The Fluorspar Industry of the United States with Special Reference to the Illinois-Kentucky District. Urbana, 1938.

MLA (9th ed.) Citation

Hatmaker, Paul, and Hubert W. Davis. The Fluorspar Industry of the United States with Special Reference to the Illinois-Kentucky District. 1938.