@misc{indiciaeff393dbbbbae,
  title = {Optical measurements on contaminated surfaces},
  author = {Bonham, T. E. and Schmitt, R. J. and Linford, R. M. F.},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19760004075},
  note = {Source identifier: 19760004075}
}