Occurrence of the alligatoroid genus Allognathosuchus in the Lower Oligocene /

Bibliographic Details
Main Author:	Patterson, Bryan, 1909-1979
Format:	Book
Language:	English
Published:	Chicago, [publisher not identified] ; 1931.
Series:	Publication (Field Museum of Natural History) ; 297. Fieldiana. Geology ; v. 4, no. 6.
Subjects:	Allognathosuchus. Paleontology > Oligocene. Paleontology > South Dakota.

Description
Physical Description:	pages 223-226 : plate XLI (frontispiece) ; 25 cm.