The Essex fauna and medusae:
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Bibliographic Details
Main Authors: Johnson, Ralph G. (Author), Richardson, Eugene S. (Author)
Format: Book
Language:English
Published: Chicago, Ill. Field Museum of Natural History 1968
Series:Pennsylvanian invertebrates of the Mazon Creek Area, Illinois [7]
Subjects:
Physical Description:S. 109 - 115 Ill.

There is no print copy available.

Interlibrary loan Place Request Caution: Not in THWS collection!