@misc{indiciae9e6a25cf0c4c,
  title = {Terrestrial impact structures; a bibliography, 1965-68},
  author = {Jacquelyn H. Freeberg},
  year = {1969},
  doi = {10.3133/b1320},
  url = {https://pubs.usgs.gov/publication/b1320},
  note = {Source identifier: b1320}
}