Pennsylvanian invertebrates of the Mazon Creek area, Illinois: the Essex fauna and medusae
The essex fauna and medusae.
Fieldiana. Geology ; v. 12, no. 7
Publication (Field Museum of Natural History) ; 1043
Johnson, Ralph Gordon, 1927-1976
Richardson, Eugene S., Jr. (Eugene Stanley), 1916-1983
, joint author.
[Chicago] :Field Museum Press ,1968.
"April 18, 1968."
Fieldiana series has been published as Geological Series by Field Columbian Museum (1895-1909) and Field Museum of Natural History (1909-1943), and as Fieldiana: Geology by Chicago Natural History Museum (1945-1966) and Field Museum of Natural History (1966-).
QE1 .F4 vol. 12, no. 7
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