TY  - RPRT
TI  - Determining the fusain content of illinois coals. A comparison of chemical and petrographic methods
AU  - B.C. Parks
AU  - G.W. Land
AU  - O.W. Rees
PY  - 2002
DO  - 10.1021/i560104a008
UR  - https://pubs.usgs.gov/publication/70011061
ID  - 70011061
ER  -