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  1. Pennsylvanian tree fern compressions Caulopteris, Megaphyton, and Artisophyton gen. nov. in Illinois /
    By: Pfefferkorn, Hermann W. - Illinois State Geological Survey. - Illinois.
    Publication info: Urbana :Illinois State Geological Survey,1976.
    Contributed by: University Library, University of Illinois Urbana Champaign
    Subjects: Bomen (biologie)  Ferns, Fossil  Illinois  Paleobotany  Pennsylvanian  Varens  
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  2. A second century of ferns : being figures with brief descriptions of one hundred new, or rare, or imperfectly known species of ferns from various parts of the world /
    By: Hooker, William Jackson, - Fitch, J. N. - Fitch, W. H. - Pamplin, William, - A. Dulau & Co.,
    Publication info: London :Dulau,1864.
    Contributed by: Multiple institutions
    Subjects: Colored  Ferns  Lithographs  Pictorial works  Pteridophyta  Varens  
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  3. Some fern-like fructifications and their spores from the Mazon Creek compression flora of Illinois (Pennsylvanian)
    By: Pfefferkorn, Hermann W. - Peppers, Russel A. - Phillips, Tom Lee,
    Publication info: Urbana,Illinois State Geological Survey,1971.
    Contributed by: University Library, University of Illinois Urbana Champaign
    Subjects: Bevruchting  Ferns, Fossil  Flora (biologie)  Grundy County  Illinois  Paleobotany  Pennsylvanian  Plants, Fossil  Varens  Will County  
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  4. The study of the biology of ferns by the collodion method. : for advanced and collegiate students /
    By: Atkinson, George Francis,
    Publication info: New York ;Macmillan and Co.,1894 [1893]
    Contributed by: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Anatomy  Ferns  Life cycles  Microscope and microscopy  Morphology  Plant anatomy  Pteridophyta  Spores  Technique  Varens  
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