@inproceedings{inproceedingsa488a319,
title   = {Efforts toward a 10' geoid for South America},
author = {Blitzkow, Denizar and Lobianco, Maria Cristina Barboza and Fairhead, J D},
year = {1997},
publisher = {IAG},
booktitle   = {Congresso Brasileiro de Cartografia}
}