00918cam a22002651 4500 gs 68000132 DLC 20260227111421.0 710913s1968 nyua b 000 0 eng c gs 68000132 U.S. Geol. Survey. Libr. DLC DLC n-us-tx QE811 .B57 564/.1 Bird, Samuel O. (Samuel Oscar), 1934- A pelecypod fauna from the Gaptank Formation (Pennsylvanian) west Texas, by Samuel O. Bird. Ithaca, N.Y., Paleontological Research Institution, 1968. 112-185 p. illus. 23 cm. Bulletins of American paleontology, v. 54, no. 240 Bibliography: p. 167-173. Bivalves, Fossil Texas. Paleontology Pennsylvanian. Paleontology Texas, West. Gaptank Formation (Pennsylvanian) west Texas. 30407 30407