@misc{indiciaef16c5900ef3a,
  title = {Electric-field level-crossing spectroscopy.},
  author = {Happer, W., Jr. and Khadjavi, A. and Lurio, A.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19670039101},
  note = {Source identifier: 19670039101}
}