@misc{indiciae1c4c60c44cea,
  title = {Preliminary geologic map of the Tycho quadrangle of the Moon},
  author = {Howard A. Pohn},
  year = {1970},
  doi = {10.3133/ofr70263},
  url = {https://pubs.usgs.gov/publication/ofr70263},
  note = {Source identifier: ofr70263}
}