TY  - RPRT
TI  - Mining geology of the Pond Creek seam, Pikeville Formation, Middle Pennsylvanian, in part of the Eastern Kentucky Coal Field, USA
AU  - S.F. Greb
AU  - J.T. Popp
PY  - 1999
DO  - 10.1016/s0166-5162(99)00010-5
UR  - https://pubs.usgs.gov/publication/70021933
ID  - 70021933
ER  -