@misc{indiciae32b4ad70d87d,
  title = {Laser grating interferometer Patent},
  author = {Barber, J. B. and Emery, J. C. and Sterrett, J. R.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19710014694},
  note = {Source identifier: 19710014694}
}