@misc{indiciae1c1c308e56d4,
  title = {Photoelectric Detection of Weak Spectrum Lines},
  author = {Schneider, R. T. and Whitaker, R. O.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19660008607},
  note = {Source identifier: 19660008607}
}