@misc{indiciae18b6e8aebb18,
  title = {Guidebook to the geology of Meteor Crater, Arizona},
  author = {Eugene Merle Shoemaker and Susan W. Kieffer and Robert L. Sutton},
  year = {1974},
  url = {https://pubs.usgs.gov/publication/70227166},
  note = {Source identifier: 70227166}
}