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August 23, 2008 | History

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H. W. Pfefferkorn

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Pennsylvanian tree fern compressions Caulopteris, Megaphyton, and Artisophyton gen. nov. in Illinois

by H. W. Pfefferkorn First published in 1976 — 1 edition
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Some fern-like fructifications and their spores from the Mazon Creek compression flora of Illinois (Pennsylvanian)

by H. W. Pfefferkorn First published in 1971 — 1 edition
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OLID: OL1903774A

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Created April 1, 2008
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August 23, 2008	Edited by RenameBot	fix author name
April 1, 2008	Created by an anonymous user	initial import