Wynn, Jeffrey C. <br/><br/>
Mineral resource potential of the NB-20-4 Quadrangle, Eastern Guayana Shield, Bolívar State, Venezuela / 
by Jeffrey C. Wynn and Gary B. Sidder. 
 - [Washington]:   [United States Government Printing Office],   [1991].  
 - iii, 16 p. :  maps, tables ;  28 cm.  +2 maps. 
 -  1960 .
<br/><br/> 2 maps in pocket.  Conduct map 1: Interpretation of aeromagnetic data for the NB-20-4 Quadrangle, Eastern Bolivar State, Venezuella.  Conduct map 2: Geology of  the NB-20-4 Quadrangle, Eastern Bolivar State, Venezuella. 
<br/><br/>Includes bibliographical references (p. 14-16). 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mines and mineral resources--Venezuela--Bolivar (State)<br/>Geology--Venezuela--Bolivar (State)
<br/><br/><label>Dewey Class. No.: </label>557.3