@misc{indiciaecb3b5efaa37b,
  title = {Gratings and waveguides},
  author = {Bates, K. A. and Erwin, J. K. and Li, L. and Burke, J. J. and Ramanujam, N.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19940010514},
  note = {Source identifier: 19940010514}
}