@misc{indiciaec27d2e8b5e05,
  title = {Shaded relief map of the Borealis area of Mercury (Borea Albedo Province)},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1977},
  doi = {10.3133/i1056},
  url = {https://pubs.usgs.gov/publication/i1056},
  note = {Source identifier: i1056}
}