References
DUKE, V. W. A., 1982, MANGANESE, A MINERAL COMMODITY REVIEW: INTERNAL REPORT 53, SOUTH AFRICAN MINERALS BUREAU, JOHANNESBURG, SOUTH AFRICA, 246 P. (REP4, C18)NATIONAL MATERIALS ADVISORY BOARD, 1981, MANGANESE RESERVES AND RESOURCES OF THE WORLD AND THEIR INDUSTRIAL IMPLICATIONS: NMAB-374, NATIONAL ACADEMY OF SCIENCES, WASHINGTON, DC, P. 104-105, 110. (RR25, RR32, L11, C14, PC1, RR1, RR8, RR33, RR40)WORLD MINING, APRIL 1979. (PA1-PA4, PA8)DORR, J., 1970, IRON FORMATION AND ASSOCIATED MANGANESE IN BRAZIL, IN GENESIS OF PRECAMBRIAN IRON AND MANGANESE DEPOSITS: PROCEEDINGS OF THE KIEV SYMPOSIUM, AUG. 1970, PARIS, UNESCO, P. 105-114.DORR, J., 1945, MANGANESE AND IRON DEPOSITS OF MORRO DO URUCUM, MATO GROSSO, BRAZIL: U.S. GEOLOGICAL SURVEY BULLETIN 946-A, 47 P.ROSKILL INFORMATION SERVICES LTD., 1982, THE ECONOMICS OF MANGANESE: LONDON, 3RD ED., P. 102.HARALYI, N.L.E., AND WALDE, D.H.G., 1986, OS MINERIOS DE FERRO Y MANGANSES DA REGIAO DE URUCUM, CORUMBA, MATO GROSSO DO SUL: IN PRINCIPAIS DEPOSITOS MINERAIS DO BRASIL, EDS. C. SCHOBBENHAUS AND C.E.S. COELHO, V. II, P. 127-144.DEYOUNG AND OTHERS, 1984, U.S. GEOLOGICAL SURVEY CIRCULAR 930-A, 22 P.DORR, JOHN, 1974, RESERVES AND RESOURCES OF MANGANESE ORE IN BRAZIL.yPA1-PA3: RF3; PA4: RF6, P. 102. PC1: RF2, P. 104.RR1: RF2, P. 105, 110. HARALYI AND WALDE (1986)