Comments on the Sm-Nd isotope systematics of calc-alkaline granitoids from the Pinhal-Ipuiúna batholith (São Paulo and Minas Gerais, Brazil) - Janasi, Valdecir de Assis; Haddad, Regina Clelia; Vlach, Silvio Roberto Farias (South American Symposium on Isotope Geology, 1997)