@misc{indiciae294cd0ecac2c,
  title = {Vegetation spatial variability and its effect on vegetation indices},
  author = {Ormsby, J. P. and Choudhury, B. J. and Owe, M.},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19880027656},
  note = {Source identifier: 19880027656}
}