@misc{indiciaeb2510c9c7975,
  title = {Geologic maps of the Apennine-Hadley region of the Moon Apollo 15 pre-mission maps},
  author = {M. H. Carr and K. A. Howard and Farouk El-Baz},
  year = {1971},
  doi = {10.3133/i723},
  url = {https://pubs.usgs.gov/publication/i723},
  note = {Source identifier: i723}
}