Illinois mineral industry in 1948 /
by Walter H. Voskuil.
APA Citation
Voskuil, W. Henry. (1950). Illinois mineral industry in 1948. Urbana, Ill.: State Geological Survey.
MLA Citation
Voskuil, Walter Henry, 1892-. Illinois Mineral Industry In 1948. Urbana, Ill.: State Geological Survey, 1950.
Warning: These citations may not always be complete (especially for serials).