Pennsylvanian invertebrates of the Mazon Creek area, Illinois
Subtitle: the morphology and affinities of Tullimonstrum
By: [by] Ralph Gordon Johnson and Eugene S. Richardson, Jr.
Contributors: Richardson, Eugene Stanley, 1916- joint author.
Series: Fieldiana.; v. 12, no. 8; Field Museum of Natural History. Publication, 1065; Publication (Field Museum of Natural History) ;; 1065.
Publisher: Field Museum of Natural History]
Published: 1969
Place of publication: [Chicago
Language: eng
Number of pages: 149
Subjects: Tullimonstrum.; Paleontology -- Pennsylvanian.; Paleontology -- Illinois.
Notes: Bibliography: p. 148-149.