@misc{indiciaeee42593049bf,
  title = {Geologic map of the Tolstoj Quadrangle of Mercury},
  author = {G. G. Schaber and J.F. McCauley},
  year = {1980},
  doi = {10.3133/i1199},
  url = {https://pubs.usgs.gov/publication/i1199},
  note = {Source identifier: i1199}
}