@misc{indiciaed1c0665be34e,
  title = {Panels illuminated by edge-lighted lens technique},
  author = {Haag, G. E. and Horsfall, R. B.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19660000505},
  note = {Source identifier: 19660000505}
}