@misc{indiciaed71e6936f231,
  title = {How To Obtain Aerial Photographs},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1999},
  doi = {10.3133/fs08199},
  url = {https://pubs.usgs.gov/publication/fs08199},
  note = {Source identifier: fs08199}
}