@misc{indiciaeea2fba5694da,
  title = {Ion thruster diagnostics using spectral line amplitudes.},
  author = {Milder, N. L. and Sovey, J. S.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720033185},
  note = {Source identifier: 19720033185}
}