TY  - RPRT
TI  - Collection, chemical analysis, and evaluation of coal samples in 1975
AU  - Vernon Emanuel Swanson
AU  - J.H. Medlin
AU  - J. R. Hatch
AU  - S.L. Coleman
AU  - G.H. Wood
AU  - S.D. Woodruff
AU  - R.T. Hildebrand
PY  - 1976
DO  - 10.3133/ofr76468
UR  - https://pubs.usgs.gov/publication/ofr76468
ID  - ofr76468
ER  -