@misc{indiciae84d5ed418a85,
  title = {Map showing relief and surface markings of the lunar polar regions},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1981},
  doi = {10.3133/i1326b},
  url = {https://pubs.usgs.gov/publication/i1326B},
  note = {Source identifier: i1326B}
}