@misc{indiciae7559f4f8a5da,
  title = {Preliminary Mars chart, Equatorial Region (Mercator Projection)},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1972},
  doi = {10.3133/ofr72417},
  url = {https://pubs.usgs.gov/publication/ofr72417},
  note = {Source identifier: ofr72417}
}