@misc{indiciae4ffaca7ec87a,
  title = {A limitation of first generation Lunar Orbiter negatives as applied to photoclinometry},
  author = {Neil Gambell and Baerbel K. Lucchitta},
  year = {1968},
  doi = {10.3133/ofr69101},
  url = {https://pubs.usgs.gov/publication/ofr69101},
  note = {Source identifier: ofr69101}
}