@misc{indiciaefa60f58ac7dd,
  title = {Land use and land cover and associated maps for Valentine, Nebraska; South Dakota},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1981},
  doi = {10.3133/ofr81622},
  url = {https://pubs.usgs.gov/publication/ofr81622},
  note = {Source identifier: ofr81622}
}