@misc{indiciae17eab0b97cf6,
  title = {PROSPECTS FOR EARLY MANNED INTERPLANETARY FLIGHTS},
  author = {Gillespie, R. W. and Ragsac, R. V. and Ross, S. E.},
  year = {1963},
  url = {https://ntrs.nasa.gov/citations/19630024206},
  note = {Source identifier: 19630024206}
}