@misc{indiciae49e9f68fd565,
  title = {Shaded relief map of the Beethoven Quadrangle of Mercury (Solitudo Lycaonis Albedo province)},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1977},
  doi = {10.3133/i1029},
  url = {https://pubs.usgs.gov/publication/i1029},
  note = {Source identifier: i1029}
}