Yochelson, Ellis Leon 1928-2006
Permian gastropoda of the southwestern United States : 1. Euomphalacea, Trochonematacea, Pseudophoracea, Anomphalacea, Craspedostomatacea, and Platyceratacea / Ellis L. Yochelson. -- New York : [s.n.], 1956 - p. 177-275, [8]p. de lám. -- (Bulletin of the American Museum of Natural History ; 110, 3).
Gastrópodos
594.3
Permian gastropoda of the southwestern United States : 1. Euomphalacea, Trochonematacea, Pseudophoracea, Anomphalacea, Craspedostomatacea, and Platyceratacea / Ellis L. Yochelson. -- New York : [s.n.], 1956 - p. 177-275, [8]p. de lám. -- (Bulletin of the American Museum of Natural History ; 110, 3).
Gastrópodos
594.3