@misc{indiciae9b5e2f0ecc2e,
  title = {Geologic map of the Cebrenia quadrangle of Mars},
  author = {W. E. Elston},
  year = {1979},
  doi = {10.3133/i1140},
  url = {https://pubs.usgs.gov/publication/i1140},
  note = {Source identifier: i1140}
}