@misc{indiciae21f86148e2f6,
  title = {Geologic map of the Uruk Sulcus Quadrangle of Ganymede},
  author = {J. E. Guest and Remo Bianchi and Ronald Greeley},
  year = {1988},
  doi = {10.3133/i1934},
  url = {https://pubs.usgs.gov/publication/i1934},
  note = {Source identifier: i1934}
}