@misc{indiciaed710c6697871,
  title = {Study to determine the flight test objectives for ion propulsion systems monthly progress report, jul. 1961},
  author = {Kalensher, B. E.},
  year = {1961},
  url = {https://ntrs.nasa.gov/citations/19670081859},
  note = {Source identifier: 19670081859}
}