@misc{indiciae9f20c2b7019c,
  title = {Reconnaissance geology of the Tarbela quadrangle, Hazara District, Pakistan},
  author = {Terry W. Offield and James Alfred Calkins and S. Afaq Ali},
  year = {1973},
  doi = {10.3133/ofr73206},
  url = {https://pubs.usgs.gov/publication/ofr73206},
  note = {Source identifier: ofr73206}
}