@misc{indiciae5964599c969a,
  title = {Geologic map of the Syrtis Major Quadrangle of Mars},
  author = {J.D. Meyer and M. J. Grolier},
  year = {1977},
  doi = {10.3133/i995},
  url = {https://pubs.usgs.gov/publication/i995},
  note = {Source identifier: i995}
}