@misc{indiciae3d1ba91c6c73,
  title = {Electric Propulsion for Manned Missions},
  author = {Robert J Denington and Russell D Shattuck and William J LeGray},
  year = {1963},
  url = {https://ntrs.nasa.gov/citations/19730062640},
  note = {Source identifier: 19730062640}
}