@misc{indiciaeb383975db802,
  title = {Payload maximization and mission mode comparison for hard and soft Martian landers.},
  author = {Howard, D. A. and Knowles, G. R.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19690034833},
  note = {Source identifier: 19690034833}
}