@misc{indiciae20f4d5af6cbf,
  title = {Geologic map of the Fra Mauro region of the Moon Apollo 14 pre-mission maps},
  author = {Terry W. Offield},
  year = {1970},
  doi = {10.3133/i708},
  url = {https://pubs.usgs.gov/publication/i708},
  note = {Source identifier: i708}
}