Palynology and petrography of a Middle Devonian coal in Illinois Peppers, Russel A. (Russel Allen), 1932- creator Damberger, H. H., 1933- joint author. contributor text book Urbana Illinois State Geological Survey 1969 1969
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ENG Cover title. Coal Devonian Geology Illinois Paleobotany Palynology QE105 .A45 no. 445 557.73/08 s Circular (Illinois State Geological Survey), 445 https://www.biodiversitylibrary.org/bibliography/61460 133798 79629701 10.5962/bhl.title.61460 DLC