@misc{indiciae006c3adb118d,
  title = {Simple Schlieren Light Meter},
  author = {Rhodes, David B. and Franke, John M. and Jones, Stephen B. and Leighty, Bradley D.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19920000004},
  note = {Source identifier: 19920000004}
}