@misc{indiciaec2098098b8c7,
  title = {Microdensitometer errors: Their effect on photometric data reduction},
  author = {Bozyan, E. P. and Opal, C. B.},
  year = {1984},
  url = {https://ntrs.nasa.gov/citations/19840019955},
  note = {Source identifier: 19840019955}
}