Cooper, Gustav Arthur 1902- <br/><br/>
Permian brachiopods of West Texas 
/ G. Arthur Cooper and Richard E. Grant. 
 - Washington  Smithsonian Institution Press  1977. 
 - vol. : illustrations. ; 30 cm. 
 - Smithsonian contributions to paleobiology  no. 14-15, 19, 21, .
<br/><br/>Includes bibliographies 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Brachiopoda, Fossil<br/>Palaeontology--Permian<br/>Paleontology--Texast