Simpson group (Middle Ordovician) trilobites of Oklahoma.
Series: Memoir / Paleontological Society -- 6.; Memoir (Paleontological Society) -- 6.; Journal of paleontology -- v. 48, no. 5, suppl.
Publisher: The Paleontological Society
Published: 1974
Place of publication: [Tulsa, Okla
Language: eng
Number of pages: 54
Subjects: Trilobites.; Paleontology -- Oklahoma.; Paleontology -- Ordovician.
Notes: Issued as Journal of Paleontology, v. 48, no. 5, supplement, September, 1974.

Bibliography: p. 51-54.