@misc{indiciae4bf5f28589fb,
  title = {Annotated bibliography of remote sensing methods for monitoring desertification},
  author = {A. S. Walker and Charles J. Robinove},
  year = {1981},
  doi = {10.3133/cir851},
  url = {https://pubs.usgs.gov/publication/cir851},
  note = {Source identifier: cir851}
}