@misc{indiciae496efb36e410,
  title = {Determining density of maize canopy. 3: Temporal considerations},
  author = {Stoner, E. R. and Baumgardner, M. F. and Anuta, P. E. and Cipra, J. E.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19730007694},
  note = {Source identifier: 19730007694}
}