@misc{indiciae4d1e6959c632,
  title = {Vegetation canopy PAR absorptance and the normalized difference vegetation index - An assessment using the SAIL model},
  author = {Goward, Samuel N. and Huemmrich, Karl F.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19920043715},
  note = {Source identifier: 19920043715}
}