@misc{indiciae96b361dde7a1,
  title = {Basin-ring spacing on the Moon, Mercury, and Mars},
  author = {R.J. Pike and P. D. Spudis},
  year = {1987},
  doi = {10.1007/bf00054060},
  url = {https://pubs.usgs.gov/publication/70014227},
  note = {Source identifier: 70014227}
}