@misc{indiciae2f1be175251a,
  title = {Geologic map of the Perrine (Jg-2) and Nun Sulci (Jg-5) quadrangles of Ganymede},
  author = {G.E. McGill and S. W. Squyres and S.J. Uzman},
  year = {1997},
  doi = {10.3133/i2459},
  url = {https://pubs.usgs.gov/publication/i2459},
  note = {Source identifier: i2459}
}