@misc{indiciaee1f281973891,
  title = {Preliminary geologic map of Lunar Orbiter site orb II P-6},
  author = {M. J. Grolier},
  year = {1967},
  doi = {10.3133/ofr68115},
  url = {https://pubs.usgs.gov/publication/ofr68115},
  note = {Source identifier: ofr68115}
}