@misc{indiciae161afc1a7e1b,
  title = {Geologic map of the Fra Mauro region of the Moon-- Apollo 13},
  author = {Richard E. Eggleton and Terry W. Offield},
  year = {1970},
  doi = {10.3133/ofr70245},
  url = {https://pubs.usgs.gov/publication/ofr70245},
  note = {Source identifier: ofr70245}
}