@inproceedings{inproceedings01d81e68,
title   = {Zn, Mo, Mn and Cu concentration in a argillaceous layer near a chemical industry, state of São Paulo, Brazil},
author = {Sígolo, Joel Barbujiani and Amarante, A},
year = {1997},
publisher = {Universidade do Minho},
booktitle   = {Semana de Geoquímica}
}