@misc{indiciae4118829619d5,
  title = {The 3D Elevation Program: summary for Pennsylvania},
  author = {William J. Carswell},
  year = {2015},
  doi = {10.3133/fs20153019},
  url = {https://pubs.usgs.gov/publication/fs20153019},
  note = {Source identifier: fs20153019}
}