Mapel, William Jameson <br/><br/>
Nonopaque heavy minerals in Sandstone of Jurassic and cretaceous age in the black hills Wyoming and South Dakota / 
by W. J. Mapel, W. A. Chisholm and R. E. Bergenback. 
 -- Washington :   United States Government Printing Office,   1964 
 - 59 p. + map. -- 
 (Geological Survey Bulletin  ;  1161-C).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cretácico<br/>Dakota del Sur<br/>Estratigrafía<br/>Jurásico<br/>Wyoming
<br/><br/><label>Universal Decimal Class. No.: </label>551.762/.763(783+787)