@misc{indiciaeafd7ac50078f,
  title = {Preliminary geologic map of the Erythraeum region of Mars},
  author = {Richard Hereford},
  year = {1974},
  doi = {10.3133/ofr74144},
  url = {https://pubs.usgs.gov/publication/ofr74144},
  note = {Source identifier: ofr74144}
}