@misc{indiciaece2d35cfbbc5,
  title = {Geologic map of Apollo landing sites 3 and 3R (Part of Oppolzer A region, Sinus Medii)},
  author = {N.J. Trask},
  year = {1970},
  doi = {10.3133/i621},
  url = {https://pubs.usgs.gov/publication/i621},
  note = {Source identifier: i621}
}