@misc{indiciae6b7b80a73321,
  title = {Testing of the Apollo 15 Metric Camera System.},
  author = {Helmering, R. J. and Alspaugh, D. H.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19730036901},
  note = {Source identifier: 19730036901}
}