@misc{indiciae08cfd24b6885,
  title = {Geologic map of Apollo Landing Site 7},
  author = {P. Jan Cannon},
  year = {1969},
  doi = {10.3133/ofr6931},
  url = {https://pubs.usgs.gov/publication/ofr6931},
  note = {Source identifier: ofr6931}
}