@misc{indiciae2fdc8105f9d1,
  title = {Investigation to develop a multistage forest sampling inventory system using ERTS-1 imagery},
  author = {Langley, P. G.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730013567},
  note = {Source identifier: 19730013567}
}