@misc{indiciae3d530168715e,
  title = {Towards Other Planetary Systems (TOPS): A technology needs identification workshop},
  author = {Black, David C. and Nishioka, Kenji},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19920013718},
  note = {Source identifier: 19920013718}
}