@inproceedings{inproceedings444df4a2,
title   = {Trend surface and inverse distance analysis: preliminar techniques in orientating geothechnical investigation},
author = {Pejon, Osni José and Zuquette, Lázaro Valentin},
year = {1991},
publisher = {International Association Engineering Geology},
booktitle   = {International Symposium on Urban Geology}
}