@misc{indiciae2afe9615e2f5,
  title = {Preliminary geologic map of the Schiller quadrangle of the Moon},
  author = {Terry W. Offield},
  year = {1969},
  doi = {10.3133/ofr69186},
  url = {https://pubs.usgs.gov/publication/ofr69186},
  note = {Source identifier: ofr69186}
}