Pennsylvanian invertebrates of the Mazon Creek area, Illinois.
Subtitle: Trilobitomorpha arthropleurida
By: Eugene S. Richardson, Jr. --
Contributors: Chicago Natural History Museum.
Series: Fieldiana : geology -- v. 12, no. 5; Chicago Natural History Museum. Publication -- 869; Fieldiana -- v. 12, no. 5.; Publication (Chicago Natural History Museum) -- 869.
Publisher: Chicago Natural History Museum Press
Published: 1963
Place of publication: [Chicago]
Subjects: Arthropoda, Fossil -- Illinois.; Paleontology -- Illinois.; Paleontology -- Pennsylvanian.
Other titles: Trilobitomorpha, arthropleurida, II; Pennsylvanian invertebrates of the Mazon Creek area, Illinois; Trilobitomorpha, arthropleurida