@inproceedings{inproceedingsf0185abe,
title   = {Study of the working conditions in the brazilian coal mining},
author = {Barreiros, Dorival and Hennies, Wildor Theodoro and Eston, Sérgio Médici de},
year = {1993},
publisher = {s.n.},
booktitle   = {World Congress on Occupational Safety and Health}
}