@misc{indiciae5f6344326e17,
  title = {Preliminary pictorial map of Callisto},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1979},
  doi = {10.3133/i1239},
  url = {https://pubs.usgs.gov/publication/i1239},
  note = {Source identifier: i1239}
}