@misc{indiciae5232d13f50dc,
  title = {Aerial profiling of terrain system (APTS) applications test report; Charles River Project},
  author = {W.H. Chapman},
  year = {1985},
  doi = {10.3133/ofr85302},
  url = {https://pubs.usgs.gov/publication/ofr85302},
  note = {Source identifier: ofr85302}
}