APA (7th ed.) Citation

Busch, W. L. (1969). Directory of Illinois limestone and dolomite producers. Illinois State Geological Survey.

Chicago Style (17th ed.) Citation

Busch, Willis L. Directory of Illinois Limestone and Dolomite Producers. Urbana: Illinois State Geological Survey, 1969.

MLA (9th ed.) Citation

Busch, Willis L. Directory of Illinois Limestone and Dolomite Producers. Illinois State Geological Survey, 1969.