TY  - RPRT
TI  - RECENT DEVELOPMENTS ON THE ORIGIN OF MINERAL MATTER IN COAL.
AU  - C. B. Cecil
AU  - R.W. Stanton
AU  - F.T. Dulong
AU  - L.P. Ruppert
PY  - 1983
UR  - https://pubs.usgs.gov/publication/70011207
ID  - 70011207
ER  -