@misc{indiciaec0f7e4131b9d,
  title = {Land use and land cover, 1972-73, Nogales, Arizona},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1981},
  doi = {10.3133/l157},
  url = {https://pubs.usgs.gov/publication/l157},
  note = {Source identifier: l157}
}