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1.- Nb-Ta-(Ti-Sn) oxide mineral chemistry as tracer of rare element granitic pegmatite fractionation in the Borborema Province, northeastern Brazil Springer-Verlag; Berlin; DEU; Federal Republic of Germany, 2008 Thematic issue on Brazil Ver registro
2.- Titanian ixiolite; niobian rutile intergrowths from the Borborema pegmatitic province, northeastern Brazil Mineralogical Association of Canada; Ottawa, ON; CAN; Canada, 2007 Ver registro
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