TY  - RPRT
TI  - Selected references: Coal geology of the central and southern Appalachian basin
AU  - Leslie F. Ruppert
AU  - Susan J. Tewalt
AU  - Yomayra A. Roman Colon
PY  - 2014
DO  - 10.3133/pp1708h.3
UR  - https://pubs.usgs.gov/publication/pp1708H.3
ID  - pp1708H.3
ER  -