@misc{indiciaecbd161a90813,
  title = {Research, investigations, and technical developments : National Mapping Program 1985-1986},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1988},
  doi = {10.3133/ofr87315},
  url = {https://pubs.usgs.gov/publication/ofr87315},
  note = {Source identifier: ofr87315}
}