TY  - RPRT
TI  - Petrology and chemistry of Permian coals from the Paraná Basin: 1. Santa Terezinha, Leão-Butiá and Candiota Coalfields, Rio Grande do Sul, Brazil
AU  - W. Kalkreuth
AU  - M. Holz
AU  - M. Kern
AU  - G. Machado
AU  - A. Mexias
AU  - M.B. Silva
AU  - J. Willett
AU  - R. Finkelman
AU  - H. Burger
PY  - 2006
DO  - 10.1016/j.coal.2005.10.006
UR  - https://pubs.usgs.gov/publication/70028288
ID  - 70028288
ER  -