@misc{indiciae9dc6debddf1a,
  title = {Visible CW parametric oscillator using barium sodium niobate},
  author = {Laurence, C. and Tittel, F.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710058091},
  note = {Source identifier: 19710058091}
}