@misc{indiciae7d38806f30dd,
  title = {Cometary and meteorite swarm impact on planetary surfaces},
  author = {Okeefe, J. D. and Ahrens, T. J.},
  year = {1982},
  url = {https://ntrs.nasa.gov/citations/19820057983},
  note = {Source identifier: 19820057983}
}