| Reference | {Deposit:: LEFOND, S.J., 1973, BRAZILIAN MINING: RELAXED GOV T ATTITUDE}{Deposit:: THE WAY FOR EXPLOITING CRITICAL RESERVES: MIN. ENG. V.25}{Deposit:: PG.31-45.}{Deposit:: ROCHA, A.J.D., 1973, PERFIL ANALITICO DO CHUMBO: DNPM BOLETI}{Deposit:: RIO DE JANEIRO, 76P.}{Deposit:: AUGUST 25, 1975: DOURADO ROCHA, A.O., 1973, ANALYTICAL PROFI}{Deposit:: LEAD [PORT]: D.N.P.M., MIN. MIN. ENER., BOL. NO. B, 74 P.}{Deposit:: BASIC DOCUMENT, 1970, CONTRIBUTIONS TO THE GEO-ECONOMIC DEVE}{Deposit:: OF SAO PAOLO AND PARANA [PORT.]: D.N.P.M., MIN. MIN. ENER, P}{Deposit:: ESP. NO. 10, 111 P. (AUTHORY PINTO COELHO, FRANCISCO DAS CHA} |