@misc{indiciaef6cd816fd07e,
  title = {Extended performance solar electric propulsion thrust system study. Volume 1: Executive summary},
  author = {Poeschel, R. L. and Hawthorne, E. I.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19780002262},
  note = {Source identifier: 19780002262}
}