@misc{indiciae4189135856bc,
  title = {Geologic map of Apollo landing sites 4 and 4R part of Wichmann CA region, Oceanus Procellarum},
  author = {Mareta West and P. J. Cannon},
  year = {1971},
  doi = {10.3133/i625},
  url = {https://pubs.usgs.gov/publication/i625},
  note = {Source identifier: i625}
}