@misc{indiciaef6cc060f7dc8,
  title = {Geology of the Khyber Pass, Khyber Agency, Pakistan},
  author = {Karl W. Stauffer},
  year = {1975},
  doi = {10.3133/ofr75272},
  url = {https://pubs.usgs.gov/publication/ofr75272},
  note = {Source identifier: ofr75272}
}