@misc{indiciae009b44b46074,
  title = {Land use and land cover and associated maps for Ajo, Arizona},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1977},
  doi = {10.3133/ofr77149},
  url = {https://pubs.usgs.gov/publication/ofr77149},
  note = {Source identifier: ofr77149}
}