Ciriacks, Kenneth W. <br/><br/>
Permian and eotriassic bivalves of yhe middle rockies / 
Kenneth W. Ciriacks. 
 -- New York :   [s.n.],   1963 
 - 100, [33] p. de lám. 
 (Bulletin of the American Museum of Natural History  ; 125,1).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Moluscos
<br/><br/><label>Universal Decimal Class. No.: </label>594