@misc{indiciaecd5ea22c4fda,
  title = {Geology and mineral resources of the Chitral-Partsan area, Hindu Kush Range, northern Pakistan},
  author = {James Alfred Calkins and S. Jamiluddin and Kamaluddin Bhuyan and Ahmad Hussain},
  year = {1981},
  doi = {10.3133/pp716g},
  url = {https://pubs.usgs.gov/publication/pp716G},
  note = {Source identifier: pp716G}
}