@misc{indiciae01c353ca060b,
  title = {Mars - Evidence for dynamic processes from Mariners 6 and 7.},
  author = {Elston, W. E. and Smith, E. I.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730059630},
  note = {Source identifier: 19730059630}
}