@misc{indiciaeb2f6dd28968d,
  title = {Preliminary geologic map of the Chryse region of Mars, Viking Mars 1975 landing site 3},
  author = {N.J. Trask},
  year = {1973},
  doi = {10.3133/ofr73279},
  url = {https://pubs.usgs.gov/publication/ofr73279},
  note = {Source identifier: ofr73279}
}