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  E-mail Message: I thought you might be interested in this item at http://www.worldcat.org/oclc/444253 Title: Pennsylvanian invertebrates of the Mazon Creek, area, Illinois: the Essex fauna and medusae Author: Ralph Gordon Johnson; Eugene Stanley Richardson Publisher: [Chicago] Field Museum of Natural History, 1968. OCLC:444253
  

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Subjects

• Jellyfishes, Fossil -- Illinois -- Essex.
• Paleontology -- Pennsylvanian.
• Paleontology -- Illinois -- Essex.

Similar Items

Pennsylvanian invertebrates of the Mazon Creek, area, Illinois: the Essex fauna and medusae

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