@misc{indiciae56074bc0482e,
  title = {Absolute efficiency measurements for channel electron multipliers utilizing a unique electron source},
  author = {Chappell, C. R. and Paschmann, G. and Sharp, R. D. and Shelley, E. G. and Smith, L. F.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19710034890},
  note = {Source identifier: 19710034890}
}