@misc{indiciae13be071007a5,
  title = {Shaded relief map of Mars; Atlas of Mars},
  author = {P.M. Bridges and J.L. Inge},
  year = {1972},
  doi = {10.3133/i810},
  url = {https://pubs.usgs.gov/publication/i810},
  note = {Source identifier: i810}
}