TY  - RPRT
TI  - SEM-EDX and isotope characterization of the organic sulfur in macerals and chars in Illinois Basin coals
AU  - I. Demir
AU  - R.D. Harvey
AU  - Keith C. Hackley
PY  - 1993
DO  - 10.1016/0146-6380(93)90043-b
UR  - https://pubs.usgs.gov/publication/70018208
ID  - 70018208
ER  -