@misc{indiciae02423490bd95,
  title = {Preliminary lunar exploration plan of the Marius Hills region of the moon},
  author = {Thor Nels Vincent Karlstrom and John Francis McCauley and G.A. Swann},
  year = {1968},
  doi = {10.3133/ofr68155},
  url = {https://pubs.usgs.gov/publication/ofr68155},
  note = {Source identifier: ofr68155}
}