TY  - RPRT
TI  - Variation of organic sulfur in macerals of selected Illinois Basin coals
AU  - I. Demir
AU  - R.D. Harvey
PY  - 1991
DO  - 10.1016/0146-6380(91)90116-2
UR  - https://pubs.usgs.gov/publication/70014930
ID  - 70014930
ER  -