@misc{indiciae0467c470b6e2,
  title = {Geologic map of the Sappho Patera Quadrangle (V-20), Venus},
  author = {George E. McGill},
  year = {2000},
  doi = {10.3133/i2637},
  url = {https://pubs.usgs.gov/publication/i2637},
  note = {Source identifier: i2637}
}