@misc{indiciae2a89d0e2031b,
  title = {Interplanetary missions for the late twentieth century},
  author = {Wallace, R. A. and Blume, W. H. and Yen, C. L. and Hulkower, N. D.},
  year = {1985},
  url = {https://ntrs.nasa.gov/citations/19850053236},
  note = {Source identifier: 19850053236}
}