@misc{indiciae6e6e55546056,
  title = {Preliminary report on coal characteristics in the Salt Range area of north-central Pakistan},
  author = {Peter D. Warwick and Tariq Shakoor},
  year = {1988},
  doi = {10.3133/ofr88637},
  url = {https://pubs.usgs.gov/publication/ofr88637},
  note = {Source identifier: ofr88637}
}