@misc{indiciae5946c47d08f9,
  title = {Geologic map of the MTM 90000 area, Planum Australe region of Mars},
  author = {Ken Herkenhoff and B. C. Murray},
  year = {1992},
  doi = {10.3133/i2304},
  url = {https://pubs.usgs.gov/publication/i2304},
  note = {Source identifier: i2304}
}