@misc{indiciaefc85eb90324e,
  title = {Determining forest canopy characteristics using airborne laser data},
  author = {Nelson, R. and Krabill, W. and Maclean, G.},
  year = {1984},
  url = {https://ntrs.nasa.gov/citations/19840054415},
  note = {Source identifier: 19840054415}
}