@misc{indiciae765697f93be2,
  title = {Geologic map of Lunar Orbiter site II P-13, Oceanus Procellarum north of equator},
  author = {M. H. Carr and S.R. Titley},
  year = {1968},
  doi = {10.3133/ofr6933},
  url = {https://pubs.usgs.gov/publication/ofr6933},
  note = {Source identifier: ofr6933}
}