APA (7th ed.) Citation

Baxter, J. W. (1960). Salem limestone in southwestern Illinois. Division of the Illinois State Geological Survey.

Chicago Style (17th ed.) Citation

Baxter, James W. Salem Limestone in Southwestern Illinois. Urbana: Division of the Illinois State Geological Survey, 1960.

MLA (9th ed.) Citation

Baxter, James W. Salem Limestone in Southwestern Illinois. Division of the Illinois State Geological Survey, 1960.