@misc{indiciae7399280ea89a,
  title = {Landslide susceptibility map of part of the Bridgeville 7 1/2-minute Quadrangle, Allegheny County and vicinity, Pennsylvania},
  author = {W.E. Davies},
  year = {1974},
  doi = {10.3133/ofr74274},
  url = {https://pubs.usgs.gov/publication/ofr74274},
  note = {Source identifier: ofr74274}
}