@misc{indiciae4d4a22bb004c,
  title = {Geologic map of the Tycho Quadrangle of the Moon},
  author = {H. A. Pohn},
  year = {1972},
  doi = {10.3133/i713},
  url = {https://pubs.usgs.gov/publication/i713},
  note = {Source identifier: i713}
}