@misc{indiciae6557fc3a9205,
  title = {Airborne precision mapping system},
  author = {W.H. Chapman and E.J. Cyran},
  year = {1988},
  doi = {10.3133/ofr88101},
  url = {https://pubs.usgs.gov/publication/ofr88101},
  note = {Source identifier: ofr88101}
}