Batten, Roger Lyman <br/><br/>
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).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Gastrópodos
<br/><br/><label>Universal Decimal Class. No.: </label>594.3