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Books subject "Pennsylvanian": Newest

2 of 2 books

en
Field Book: Pennsylvanian Plant Fossils of Illinois
Collinson, Charles William, Litterer, Marie E. (Marie Ellen), Skartvedt, Romayne
en
A New Order of Fishlike Amphibia From the Pennsylvanian of Kansas
Eaton, Theodore H. (Theodore Hildreth), Stewart, Peggy Lou