@misc{indiciae3abd5e81b3f3,
  title = {Geologic map of the Islamabad-Rawalpindi area, Punjab, northern Pakistan},
  author = {V. S. Williams and M.K. Pasha and I.M. Sheikh},
  year = {1999},
  doi = {10.3133/ofr9947},
  url = {https://pubs.usgs.gov/publication/ofr9947},
  note = {Source identifier: ofr9947}
}