Pennsylvanian invertebrates of the Mazon Creek, area, Illinois: the Essex fauna and medusae
By: [by] Ralph Gordon Johnson and Eugene S. Richardson, Jr.
Contributors: Richardson, Eugene Stanley, 1916- joint author.
Series: Fieldiana.; v. 12, no. 7; [Field Museum of Natural History] Publication 1043; Publication (Field Museum of Natural History) ;; 1043.
Publisher: Field Museum of Natural History
Published: 1968
Place of publication: [Chicago]
Language: eng
Number of pages: 115
Subjects: Jellyfishes, Fossil -- Illinois -- Essex; Paleontology -- Pennsylvanian; Paleontology -- Illinois -- Essex
Notes: Bibliography: p. 115.