| Reference | {Deposit:: BARBOZA, OCTAVIO, 1956, MANGANESE AT URUCUM: INTERNATIONAL G}{Deposit:: CAL CONGRESS, 20TH, MEXICO, VOL. NO. 3, PP. 261-274.}{Deposit:: DORR, J.V.N., 1945, MANGANESE AND IRON DEPOSITS OF MORRO DO}{Deposit:: U.S.G.S, BULLETIN NO. 946-A, PLATES, PHOTOS, 47 P.}{Reserve-Resource:: ICOMI CONTRIBUTION TO THE ROUND TABLE ON SUPPLY AND DEMAND}{Reserve-Resource:: OF TERRESTRIAL MANGANESE ORES. EUROPEAN ECONOMIC COUNCIL,}{Reserve-Resource:: BRUSSELS, BELGIUM, DEC 4-5, 1979, 20P.} |