@misc{indiciaeaec83dbb2e6f,
  title = {Map showing landslides and areas most susceptible to landsliding, Butler County, Pennsylvania},
  author = {J. S. Pomeroy},
  year = {1978},
  doi = {10.3133/mf1024},
  url = {https://pubs.usgs.gov/publication/mf1024},
  note = {Source identifier: mf1024}
}