@misc{indiciaea6fd063621c6,
  title = {Atlas of Mars, MC-18, Coprates Quadrangle},
  author = {United States Geological Survey},
  year = {1973},
  doi = {10.3133/ofr73334},
  url = {https://pubs.usgs.gov/publication/ofr73334},
  note = {Source identifier: ofr73334}
}