@misc{indiciae5d4063c7bf00,
  title = {Prototype and preliminary geologic mapping of Mars from Mariner 6 \& 7 data; parts 1, 2 and 3},
  author = {John F. McCauley and Maretta West and David Holcomb Scott and James E. Peterson and Don E. Wilhelms},
  year = {1972},
  doi = {10.3133/ofr72239},
  url = {https://pubs.usgs.gov/publication/ofr72239},
  note = {Source identifier: ofr72239}
}