Pleistocene stratigraphy of Illinois
[by] H. B. Willman and John C. Frye.
Illinois State Geological Survey Bulletin No. 94
APA Citation
Willman, H. B. (Harold Bowen)., Frye, J. Chapman., Illinois State Geological Survey. (1970). Pleistocene stratigraphy of Illinois. Urbana, Ill: [State of Illinois Dept. of Registration and Education].
MLA Citation
Willman, H. B. (Harold Bowen), 1901-, John Chapman Frye, and Illinois State Geological Survey. Pleistocene Stratigraphy of Illinois. Urbana, Ill: [State of Illinois Dept. of Registration and Education], 1970.
Warning: These citations may not always be complete (especially for serials).