Directory of Illinois mineral producers, 1988-1989 /
Irma E. Samson and John M. Masters.
APA Citation
Samson, I., Masters, J. M., Illinois State Geological Survey. (1990). Directory of Illinois mineral producers, 1988-1989. Champaign, IL: Illinois State Geological Survey.
MLA Citation
Samson, Irma, John M Masters, and Illinois State Geological Survey. Directory of Illinois Mineral Producers, 1988-1989. Champaign, IL: Illinois State Geological Survey, 1990.
Warning: These citations may not always be complete (especially for serials).