@inproceedings{inproceedings25aad0cd,
title   = {Environmental problems at the underground limestone Baltar mine, São Paulo, Brazil},
author = {Eston, Sérgio Médici de and Iramina, Wilson Siguemasa and Hennies, Wildor Theodoro and Nakamura, R T},
year = {2000},
publisher = {Balkema},
booktitle   = {International Conference on Environmental Issues and Management of Waste in Energy and Mineral Production}
}