@misc{indiciae1cb5a04b6a9b,
  title = {Ion propulsion for shared Shuttle, sun-synchronous missions},
  author = {Zafran, S. and Gran, M. H. and Fosnight, V. V. and Callens, R. A.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19810048498},
  note = {Source identifier: 19810048498}
}