Directory of Illinois sand and gravel producers
[by] W.L. Busch.
APA Citation
Busch, W. L., Illinois State Geological Survey. (1963). Directory of Illinois sand and gravel producers. Urbana: Illinois State Geological Survey.
MLA Citation
Busch, Willis L, and Illinois State Geological Survey. Directory of Illinois Sand And Gravel Producers. Urbana: Illinois State Geological Survey, 1963.
Warning: These citations may not always be complete (especially for serials).