@misc{indiciae8b3ebda36723,
  title = {A land use interpretation experiment, TR 69-5},
  author = {Nelson R. Nunnally and Richard E. Witmer},
  year = {1970},
  doi = {10.3133/ofr71218},
  url = {https://pubs.usgs.gov/publication/ofr71218},
  note = {Source identifier: ofr71218}
}