@inproceedings{inproceedings84d1380b, title = {'PB' isotopes compositions from middle proterozoic rondonian rapakivi massifs, south western margin of the amazonian craton, brazil}, author = {Tosdal, R M and Bettencourt, Jorge Silva and Leite Junior, W B and Payolla, B L}, year = {1995}, publisher = {Center for Geosciences/Federal University of para}, booktitle = {Symposium on Rapakivi Granites and Related Rocks} }