@misc{indiciaeac2807d66d67,
  title = {Toroidal Varied-Line Space (TVLS) Gratings},
  author = {Thomas, Roger J. and Oegerle, William},
  year = {2002},
  url = {https://ntrs.nasa.gov/citations/20020071039},
  note = {Source identifier: 20020071039}
}