@misc{indiciaece7f7d8f01ea,
  title = {Topographic maps of the western, eastern equatorial and polar regions of Mars},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1989},
  doi = {10.3133/i2030},
  url = {https://pubs.usgs.gov/publication/i2030},
  note = {Source identifier: i2030}
}