Reference | {Deposit:: BRITISH SULPHUR CORP. LTD., 1980: WORLD SURVEY OF PHOSPHATE DEPOSITS, 4TH ED., LONDON}{Deposit:: SOBRINHO, M.L. AND GUIMARAES, G.,1975: FOSFATO NO BRASIL. II CONGR. IBERO- AMERICANO DE GEOL. ECON.}{Deposit:: OLIVEIRA, DE. N.P., 1980: MINERALOGIE UND GEOCHEMIE DER PHOSPHATFUEHRENDEN LATERITE VON ITACUPIM UND TRAUIRA. THESIS, UNIV. ERLANGEN} |