@misc{indiciae89d11e9681de,
  title = {Geologic map of the Diacria Quadrangle of Mars},
  author = {E. C. Morris and K. A. Howard},
  year = {1981},
  doi = {10.3133/i1286},
  url = {https://pubs.usgs.gov/publication/i1286},
  note = {Source identifier: i1286}
}