Batten, Roger Lyman
Permian gastropoda of the southwestern United States : 2. Pleurotomariacea, Portlockiellidae, Phymatopleuridae, and Eotomariidae / Roger Lyman Batten. -- New York : [s.n.], 1958 - p. 157-246, [6]p. de lám. -- (Bulletin of the American Museum of Natural History ; 114, 2).
Gastrópodos
594.3
Permian gastropoda of the southwestern United States : 2. Pleurotomariacea, Portlockiellidae, Phymatopleuridae, and Eotomariidae / Roger Lyman Batten. -- New York : [s.n.], 1958 - p. 157-246, [6]p. de lám. -- (Bulletin of the American Museum of Natural History ; 114, 2).
Gastrópodos
594.3