@inproceedings{inproceedingsfdff0a13,
title   = {Chemical and textural evolution of mafic minerals from agpaitic nepheline syenites from the Poços de Caldas alkaline massif-southeastern Brazil},
author = {Gualda, Guilherme Augusto Rosa and Vlach, Silvio Roberto Farias},
year = {2000},
publisher = {CPRM},
booktitle   = {International Geological Congress}
}