@misc{indiciaebe5fea4e080d,
  title = {Methods for segment wheat area estimation},
  author = {Heydorn, R. P. and Trichel, M. C. and Erickson, J. D.},
  year = {1979},
  url = {https://ntrs.nasa.gov/citations/19800007231},
  note = {Source identifier: 19800007231}
}