@misc{indiciae63d31aa25d13,
  title = {Shaded relief map of the Tharsis Quadrangle of Mars},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1975},
  doi = {10.3133/i926},
  url = {https://pubs.usgs.gov/publication/i926},
  note = {Source identifier: i926}
}