@misc{indiciae83d6dc64f65f,
  title = {Shaded relief map of the lunar polar regions},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1981},
  doi = {10.3133/i1326a},
  url = {https://pubs.usgs.gov/publication/i1326A},
  note = {Source identifier: i1326A}
}