@misc{indiciaef3c1f8b43ef1,
  title = {Shaded relief map of the Margaritifer Sinus Quadrangle of Mars},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1975},
  doi = {10.3133/i927},
  url = {https://pubs.usgs.gov/publication/i927},
  note = {Source identifier: i927}
}