@misc{indiciae0a393313800e,
  title = {Mars chart (experimental), special area A},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1972},
  doi = {10.3133/ofr72412},
  url = {https://pubs.usgs.gov/publication/ofr72412},
  note = {Source identifier: ofr72412}
}