APA (7th ed.) Citation

Voskuil, W. H. (1950). Illinois mineral industry in 1948. State Geological Survey.

Chicago Style (17th ed.) Citation

Voskuil, Walter H. Illinois Mineral Industry in 1948. Urbana, Ill.: State Geological Survey, 1950.

MLA (9th ed.) Citation

Voskuil, Walter H. Illinois Mineral Industry in 1948. State Geological Survey, 1950.

Warning: These citations may not always be 100% accurate.