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A MICROPROBE STUDY OF RUTILE, CASSITERITE, WOLFRAMITE AND SULFIDES IN THE MORRO POTOSI GREISEN, RONDONIA, BRAZIL = ETUDE A LA MICROSONDE DE RUTILES, CASSITERITE, WOLFRAMITE ET SULFURES DANS LE GREISEN DU MORRO POTOSI, RONDONIA, BRESILOEN IS; KORPERSHOEK HR; KIEFT C et al.1982; NEUES JAHRB. MINERAL., MONATSH.; ISSN 0028-3649; DEU; DA. 1982; NO 4; PP. 175-191; ABS. ENG; BIBL. 16 REF.; 28 ANAL.; 2 TAB. ; ANAL./TABL./ILL.Article