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Palynology and petrography of a Middle Devonian coal in Illinois

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By: Peppers, Russel A. (Russel Allen), - Damberger, H. H.,

Publication info: Urbana, Illinois State Geological Survey, 1969

Holding Institution: University Library, University of Illinois Urbana Champaign
Spores in strata of late Pennsylvanian cyclothems in the Illinois Basin

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By: Peppers, Russel A. (Russel Allen), - Illinois State Geological Survey.

Publication info: Urbana, Ill, Illinois State Geological Survey, 1964

Holding Institution: University Library, University of Illinois Urbana Champaign
Some fern-like fructifications and their spores from the Mazon Creek compression flora of Illinois (Pennsylvanian)

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By: Pfefferkorn, Hermann W. - Peppers, Russel A. (Russel Allen), - Phillips, Tom Lee,

Publication info: Urbana, Illinois State Geological Survey, 1971

Holding Institution: University Library, University of Illinois Urbana Champaign