@misc{indiciae475728907099,
  title = {Atlas of Mars, Iapygia Quadrangle, MC-21},
  author = {United States Geological Survey},
  year = {1973},
  doi = {10.3133/ofr73337},
  url = {https://pubs.usgs.gov/publication/ofr73337},
  note = {Source identifier: ofr73337}
}