@misc{indiciae8cd736686392,
  title = {Procedure manual for preparation of satellite image maps},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1987},
  doi = {10.3133/ofr8619},
  url = {https://pubs.usgs.gov/publication/ofr8619},
  note = {Source identifier: ofr8619}
}