@misc{indiciaeea1701a32a32,
  title = {Multistep fluorescence gated proportional counters},
  author = {Ramsey, Brian D. and Weisskopf, Martin C.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19910063376},
  note = {Source identifier: 19910063376}
}