@misc{indiciaefa673c6a193a,
  title = {Geologic map of the Philus Sulcus Quadrangle of Ganymede},
  author = {S.L. Murchie and J.W. Head},
  year = {1989},
  doi = {10.3133/i1966},
  url = {https://pubs.usgs.gov/publication/i1966},
  note = {Source identifier: i1966}
}