@misc{indiciae7c060ee6fb52,
  title = {Coal resources available for development; a methodology and pilot study},
  author = {Jane R. Eggleston and M. Devereux Carter and James C. Cobb},
  year = {1990},
  doi = {10.3133/cir1055},
  url = {https://pubs.usgs.gov/publication/cir1055},
  note = {Source identifier: cir1055}
}