@misc{indiciaedba0cadef0db,
  title = {Preliminary geologic terrain map of Mars},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey and Baerbel K. Lucchitta},
  year = {1972},
  doi = {10.3133/ofr72416},
  url = {https://pubs.usgs.gov/publication/ofr72416},
  note = {Source identifier: ofr72416}
}