@misc{indiciae6d49909939c2,
  title = {Uniform variable light sources for instrument calibration},
  author = {Rennilson, J. J. and Squyres, H. P.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700055921},
  note = {Source identifier: 19700055921}
}