01645cam a22003611 4500 5386280 20071019112159.0 710208s1968 ilua b 000 0 eng 68026377 (OCoLC)ocm00444253 DLC DLC BTCTA UIU n-us-il QE1 .F4 vol. 12, no. 7 563/.7 UIUU Johnson, Ralph Gordon, 1927-1976 Pennsylvanian invertebrates of the Mazon Creek area, Illinois: the Essex fauna and medusae / Ralph Gordon Johnson -- and Eugene S. Richardson, Jr. -- The essex fauna and medusae. [Chicago] : Field Museum Press , 1968. p. 109-115 : ill. ; 24 cm. Fieldiana. Geology ; v. 12, no. 7 Field Museum of Natural History. Publication 1043 "April 18, 1968." Includes bibliographical references (p. 115). 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-). Jellyfishes, Fossil Illinois Essex. Paleontology Pennsylvanian. Paleontology Illinois Essex. Richardson, Eugene Stanley, 1916- joint author. Field Museum of Natural History. Fieldiana. Geology ; v. 12, no. 7. Publication (Field Museum of Natural History) ; 1043. Baker and Taylor BTCP 68026377 //r934 C0 UIU