@misc{indiciae294e1465f2f3,
  title = {Topographic map of the Cydonia region of Mars},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1976},
  doi = {10.3133/i988},
  url = {https://pubs.usgs.gov/publication/i988},
  note = {Source identifier: i988}
}