TY  - RPRT
TI  - GEOLOGIC PROCESSES AFFECTING THE QUALITY OF THE UPPER FREEPORT COAL BED, WEST-CENTRAL PENNSYLVANIA.
AU  - R.W. Stanton
AU  - C. B. Cecil
AU  - B.S. Pierce
AU  - L.F. Ruppert
AU  - F.T. Dulong
PY  - 1985
UR  - https://pubs.usgs.gov/publication/70013100
ID  - 70013100
ER  -