@misc{misca9af94f5,
title   = {Considerations on environmental engineering and mine safety at the underground potash mine of taquari-vassouras, Sergipe, Brazil},
author = {Rocha, R O and Hennies, Wildor Theodoro and Eston, Sérgio Médici de},
year = {1991},
booktitle   = {International Potash Technology Conference}
}