@misc{indiciae543343a453aa,
  title = {The construction of thematic land use maps with spacecraft photography},
  author = {David E. Schwarz and D.S. Simonett and G.F. Jenks and J.R. Ratzlaff},
  year = {1969},
  doi = {10.3133/ofr69243},
  url = {https://pubs.usgs.gov/publication/ofr69243},
  note = {Source identifier: ofr69243}
}