@misc{indiciaed057f8141f87,
  title = {Precision insertion-loss calibrations at 90 GHz.},
  author = {Oltmans, D. A. and Stelzried, C. T.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690053956},
  note = {Source identifier: 19690053956}
}