@misc{indiciaefbf9911b93d2,
  title = {Visibility in space - Target description subroutine},
  author = {Breckenridge, W. T., Jr. and Dummer, R. S. and Geanacou, J. and Neu, J. T.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19660017758},
  note = {Source identifier: 19660017758}
}