@misc{indiciaecda30146ac3d,
  title = {NAPP and NHAP Photographic Enlargements},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1996},
  doi = {10.3133/fs10196},
  url = {https://pubs.usgs.gov/publication/fs10196},
  note = {Source identifier: fs10196}
}