Johnson, Robert F. 1916-
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).
Bahia ( Brasil )
Yacimientos de Zinc
553.446(813.8)
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).
Bahia ( Brasil )
Yacimientos de Zinc
553.446(813.8)