@misc{indiciaec5690e9398bf,
  title = {Laser heterodyne spectroscopy},
  author = {Betz, A. L. and Sutton, E. C. and Mclaren, R. A. and Mcalary, C. W.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19780074213},
  note = {Source identifier: 19780074213}
}