Palmer, Allison R.  1927- <br/><br/>
Trilobites of the late Cambrian Pterocephaliid biomere in the Great Basin, United States / 
by Allison R. Palmer. 
 -- Washington :   United States Government Printing Office,   1965 
 - 105 p., [20] h. de lam. -- 
 (Geological Survey Professional Paper  ; 493).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cámbrico<br/>Estados Unidos<br/>Trilobites
<br/><br/><label>Universal Decimal Class. No.: </label>565.2(73)"6131"