@misc{indiciae0145715e9461,
  title = {Regional and economic geology of Pennsylvanian age coal beds of West Virginia},
  author = {T.E. Repine and B.M. Blake and K. C. Ashton and N. Fedorko and A.F. Keiser and E.I. Loud and C.J. Smith and S. McClelland and G.H. McColloch},
  year = {1993},
  doi = {10.1016/0166-5162(93)90044-b},
  url = {https://pubs.usgs.gov/publication/70017479},
  note = {Source identifier: 70017479}
}