@inproceedings{inproceedingsd2c30e26,
title   = {U-Pb zircon ages and Pb isotopic compositions of middle proterozoic rondonian massifs, southwestern margin of the Amazon Craton, Brazil},
author = {Tosdal, R. M. and Bettencourt, Jorge Silva},
year = {1994},
publisher = {Universidad de Concepcion},
booktitle   = {Congreso Geologico Chileno}
}