@inproceedings{inproceedings5688eed2,
title   = {Natural radiation from soil using gamma-ray spectroscopy},
author = {Silveira, M A G and Medina, Nilberto Heder and Heleno, R},
year = {2008},
publisher = {SBF},
booktitle   = {Reunião de Trabalho sobre Física Nuclear no Brasil}
}