TY  - RPRT
TI  - Coal resources of selected coal beds and zones in the Northern and Central Appalachian Basin
AU  - Leslie F. Ruppert
AU  - Susan Tewalt
AU  - Linda Bragg
PY  - 2002
DO  - 10.3133/fs00402
UR  - https://pubs.usgs.gov/publication/fs00402
ID  - fs00402
ER  -