LEADER 00000cam  2200000 a 4500 
001       90022796  
003    DLC 
005    19990716000000.0 
008    901030s1991    coua     b   f000 0 eng   
010    90022796 
040    DLC|cDLC|dDLC 
050 00 QE75|b.B9 no. 1960|aTN54 
082 00 557.3 s|a333.8/5/098763|220 
086 0  I 19.3:1960 
100 1  Wynn, Jeffrey C 
245 10 Mineral resource potential of the NB-20-4 Quadrangle, 
       Eastern Guayana Shield, Bolívar State, Venezuela /|cby 
       Jeffrey C. Wynn and Gary B. Sidder 
260    Washington :|bU.S. G.P.O.,|c1991 
300    iii, 16 p. :|bill. (some col.) ;|c29 cm 
440  0 U.S. Geological Survey bulletin ;|v1960 
500    2 maps in pocket 
504    Includes bibliographical references 
650  0 Mines and mineral resources|zVenezuela|zBolívar (State) 
650  0 Geology|zVenezuela|zBolívar (State) 
700 1  Sidder, Gary B 
740 0  Guayana Shield, Bolívar State, Venezuela