TY  - RPRT
TI  - Interlaboratory comparison of mineral constituents in a sample from the Herrin (No. 6) coal bed from Illinois
AU  - Robert B. Finkelman
AU  - F.L. Fiene
AU  - R.N. Miller
AU  - F.O. Simon
PY  - 1984
DO  - 10.3133/cir932
UR  - https://pubs.usgs.gov/publication/cir932
ID  - cir932
ER  -