@inproceedings{inproceedings9575962f,
title   = {Middle proterozoic crystalline basement in the central andes, western bolivia and northern chile: a u-'PB' and 'PB' isotopic perspective},
author = {Tosdal, R M and Munizaga, F and Williams, W C and Bettencourt, Jorge Silva},
year = {1994},
publisher = {Universidad de Concepcion},
booktitle   = {Congreso Geologico Chileno}
}