@misc{indiciaeaf23fc110dda,
  title = {Nuclear electric spacecraft for unmanned planetary and interplanetary missions.},
  author = {Jaffe, L. D. and Lucas, J. W. and Merrill, O. S. and Shafer, J. I. and Spencer, D. F.},
  year = {1963},
  url = {https://ntrs.nasa.gov/citations/19630029900},
  note = {Source identifier: 19630029900}
}