@misc{indiciae8f598f9b8ce7,
  title = {Map of slopes and their environmental significance in the Marana quadrangle, Arizona},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1973},
  doi = {10.3133/i846a},
  url = {https://pubs.usgs.gov/publication/i846A},
  note = {Source identifier: i846A}
}