TY  - RPRT
TI  - Relation of the carbon/oxygen ratio in coal to igneous intrusions in the Somerset coal field, Colorado
AU  - John R. Dyni
AU  - David L. Gaskill
PY  - 1980
DO  - 10.3133/b1477a
UR  - https://pubs.usgs.gov/publication/b1477A
ID  - b1477A
ER  -