Picarrao

PERSONAL CORRESPONDENCE, COMPANHIA VALE DO RIO DOCE (CVRD),AV. GRACA ARANHA, 26-5 ANDAR BOX 2414. CEP 20000, RIODE JANEIRO, BRAZIL, 1978.STAFF, 1978 ENGINEERING AND MINING JOURNAL INTERNATIONALDIRECTORY OF MINING, P. 275.DORR, JOHN VAN N., II, NATURE AND ORIGIN OF THE HIGH GRADEHEMATITE ORES OF MINAS GERAIS, BRAZIL, ECONOMIC GEOLOGY,V. 60, NO. 1, JAN-FEB 1965, P. 1-46.ANON., BRAZILIAN IRON ORE, MINING MAGAZINE, MARCH 1977, P.153, 157.HOW VALE DO RIO DOCE EXPANDS, WORLD MINING, 1/1974 P. 34-38.POMERENE, J. B., GEOLOGY AND ORE DEPOSITS OF THE BELOHORIZONTE, ITABIRITE, AND MARCOS QUADRANGLES, MINASGERAIS, BRAZIL, U. S. GEOLOGICAL SURVEY PROF. PAPER 341,PT. D, 1964, P. D1-D80.