@misc{indiciaec2812d2f7a38,
  title = {Geology: Craters},
  author = {E. C. Morris and E.M. Shoemaker},
  year = {1970},
  doi = {10.1016/0019-1035(70)90070-9},
  url = {https://pubs.usgs.gov/publication/70009942},
  note = {Source identifier: 70009942}
}