IL State Geol. Surv., Rep. Invest. 214.
By: R. M. Kosanke, J. A. Simon, H. R. Wanless and H. B. Willman.
Contributors: Simon, J. A; Wanless, H. R; Willman, H. B
Publisher: s.n
Published: 1960
Place of publication: S.l
Notes: 84pp.

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