@misc{indiciaebbe0b4ae0c56,
  title = {Preliminary Mars chart, South Polar region, MC-30},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1972},
  doi = {10.3133/ofr72418},
  url = {https://pubs.usgs.gov/publication/ofr72418},
  note = {Source identifier: ofr72418}
}