@misc{indiciae777dab5f7f38,
  title = {Mars cartography: the 1:5,000,000 map series},
  author = {Raymond M. Batson},
  year = {1973},
  doi = {10.3133/ofr7320},
  url = {https://pubs.usgs.gov/publication/ofr7320},
  note = {Source identifier: ofr7320}
}