@misc{indiciae166c8734c13f,
  title = {Indexes of Mars topographic maps published by the U.S. Geological Survey, January 1, 1993},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1993},
  doi = {10.3133/i2392},
  url = {https://pubs.usgs.gov/publication/i2392},
  note = {Source identifier: i2392}
}