@misc{indiciae6332c98ef09d,
  title = {Map showing landslides and areas most susceptible to sliding in Beaver County, Pennsylvania},
  author = {J. S. Pomeroy},
  year = {1979},
  doi = {10.3133/i1160},
  url = {https://pubs.usgs.gov/publication/i1160},
  note = {Source identifier: i1160}
}