@misc{indiciaefc31be986079,
  title = {Portable reflectance spectrometer},
  author = {Goetz, A. F. H. and Graham, R. A. and Ozawa, T.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19840025695},
  note = {Source identifier: 19840025695}
}