@misc{indiciae0ef918e48dde,
  title = {Optical monitoring system},
  author = {Nev, J. T. and Wrench, E. H. and Fox, M. G. and Lave, H.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730000050},
  note = {Source identifier: 19730000050}
}