@misc{indiciaeb64dd9a4116b,
  title = {Index of Mariner 9 mapping pictures of Mars},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1975},
  doi = {10.3133/mf646},
  url = {https://pubs.usgs.gov/publication/mf646},
  note = {Source identifier: mf646}
}