TY  - RPRT
TI  - Size and maceral association of pyrite in Illinois coals and their float-sink fractions
AU  - R.D. Harvey
AU  - P.J. DeMaris
PY  - 1987
DO  - 10.1016/0146-6380(87)90067-2
UR  - https://pubs.usgs.gov/publication/70014785
ID  - 70014785
ER  -