@misc{indiciae665632c1fa7b,
  title = {LTV beta-gamma spectrometer, model BG-1 FINAL report},
  author = {Chappell, N. E. and Farmer, B. J.},
  year = {1965},
  url = {https://ntrs.nasa.gov/citations/19660016288},
  note = {Source identifier: 19660016288}
}