Showing 1 - 5 results of 5 for search 'Pfefferkorn, Hermann W.', query time: 0.14s Refine Results
  1. 1
    Some fern-like fructifications and their spores from the Mazon Creek compression flora of Illinois (Pennsylvanian) /
    by Pfefferkorn, Hermann W.
    Published 1971
    Book
  2. 2
    Pennsylvanian tree fern compressions Caulopteris, Megaphyton, and Artisophyton gen. nov. in Illinois /
    by Pfefferkorn, Hermann W.
    Published 1976
    Book
  3. 3
    Reconstruction and interpretation of Brittsia problematica D. White (Fern, Pennsylvanian) /
    by Pfefferkorn, Hermann W.
    Published 1976
    Book
  4. 4
    An early Pennsylvanian flora with Megalopteris and Noeggerathiales from west-central Illinois /
    by Leary, Richard L.
    Published 1977
    Other Authors: “...Pfefferkorn, Hermann W....”
    Book
  5. 5
    Development of paleobotany in the Illinois Basin /
    by Phillips, Tom Lee, 1931-
    Published 1973
    Other Authors: “...Pfefferkorn, Hermann W....”
    Book
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