@misc{indiciae1bc23089f168,
  title = {Geologic map of the MTM -20147 Quadrangle, Mangala Valles Region of Mars},
  author = {R. A. Craddock and Ronald Greeley},
  year = {1994},
  doi = {10.3133/i2310},
  url = {https://pubs.usgs.gov/publication/i2310},
  note = {Source identifier: i2310}
}