@misc{indiciae20833e9bd88f,
  title = {Irrigated cropland, 1978, Chase, Dundy, and Perkins Counties, Nebraska},
  author = {Robert Johnson},
  year = {1980},
  doi = {10.3133/ofr80641},
  url = {https://pubs.usgs.gov/publication/ofr80641},
  note = {Source identifier: ofr80641}
}