@misc{indiciae9829040c2d7b,
  title = {Landslide susceptibility map of the Ambridge 7 1/2-minute Quadrangle, Allegheny County and vicinity, Pennsylvania},
  author = {John S. Pomeroy},
  year = {1974},
  doi = {10.3133/ofr7476},
  url = {https://pubs.usgs.gov/publication/ofr7476},
  note = {Source identifier: ofr7476}
}