@misc{indiciae4f7738e0f73d,
  title = {Atlas of Mars, Sinus Sabaeus Quadrangle, MC-20},
  author = {United States Geological Survey},
  year = {1973},
  doi = {10.3133/ofr73336},
  url = {https://pubs.usgs.gov/publication/ofr73336},
  note = {Source identifier: ofr73336}
}