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  1. Pennsylvanian invertebrates of the Mazon Creek area, Illinois / Eugene S. Richardson, Jr. --
    By: Richardson, Eugene Stanley,
    Publication info: [Chicago] :Chicago Natural History Museum Press,1956.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Grundy County  Illinois  Invertebrates, Fossil  Paleontology  Pennsylvanian  Will County  
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  2. Pennsylvanian invertebrates of the Mazon Creek area, Illinois. Trilobitomorpha, Arthropleurida / Eugene S. Richardson, Jr., Curator of Fossil Invertebrates.
    By: Richardson, Eugene Stanley,
    Publication info: [Chicago]:Chicago Natural History Museum,1956.
    Contributed by: University of Illinois Urbana Champaign
    Subjects: Grundy County  Illinois  Invertebrates, Fossil  Paleontology  Pennsylvanian  Will County  
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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 of Illinois Urbana Champaign
    Subjects: Bevruchting  Ferns, Fossil  Flora (biologie)  Grundy County  Illinois  Paleobotany  Pennsylvanian  Plants, Fossil  Varens  Will County  
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