Page Source Handbook of Illinois stratigraphy
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| Series | Bulletin 95 |
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| Page(s) | 294 - 299 |
| Author | H. B. Willman, Elwood Atherton, T. C. Buschbach, Charles Collinson, John C. Frye, M. E. Hopkins, Jerry A. Lineback, Jack A. Simon |
| Date | 1975 |
| Link | Web page |
| PDF file | |
| Store | ISGS Store |