@misc{indiciaeabe7af17bea7,
  title = {Land classification of south-central Iowa from computer enhanced images},
  author = {James R. Lucas and James V. Taranik and Frederic C. Billingsley},
  year = {1975},
  url = {https://pubs.usgs.gov/publication/70236971},
  note = {Source identifier: 70236971}
}