@misc{indiciaeabcdbaf1ea07,
  title = {Radial field Kaufman thruster},
  author = {Knauer, W. and Poeschel, R. L. and Ward, J. W.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19700050004},
  note = {Source identifier: 19700050004}
}