Johnson, Robert F.  1916- <br/><br/>
Lead-Zinc deposits of the Boquira district states of Bahia, Brazil / 
by Robert F. Johnson. 
 -- Washington :   United States Government Printing Office,   1962 
 - 33 p. -- 
 (Geological Survey Bulletin  ;  1110-A).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Bahia ( Brasil )<br/>Yacimientos de Zinc
<br/><br/><label>Universal Decimal Class. No.: </label>553.446(813.8)