@misc{indiciae762f36afa7db,
  title = {Guide to the availability of hydrologic data, Greater Pittsburgh region, Pennsylvania},
  author = {Robert M. Beall},
  year = {1976},
  doi = {10.3133/ofr76352},
  url = {https://pubs.usgs.gov/publication/ofr76352},
  note = {Source identifier: ofr76352}
}