@misc{indiciae41b15bdec8fb,
  title = {Color-coded global topographic map of Mars},
  author = {Wu, Sherman S. C. and Howington-Kraus, Annie E. and Ablin, Karyn K.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19920001702},
  note = {Source identifier: 19920001702}
}