@misc{indiciae7932cf9172b3,
  title = {A predictive production rate life-cycle model for southwestern Virginia coalfields},
  author = {Robert C. Milici and Elizabeth Campbell},
  year = {1997},
  doi = {10.3133/cir1147},
  url = {https://pubs.usgs.gov/publication/cir1147},
  note = {Source identifier: cir1147}
}