@inproceedings{inproceedings8b993745,
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, Francisco and Williams, W. C. and Bettencourt, Jorge Silva},
year = {1994},
publisher = {Universidad de Concepcion},
booktitle   = {Congreso Geologico Chileno}
}