@misc{indiciae5a45e6b100ea,
  title = {Chromospheric and coronal observations with multilayer optics},
  author = {Walker, Arthur B. C., Jr. and Hoover, Richard B. and Barbee, Troy W., Jr.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19930055651},
  note = {Source identifier: 19930055651}
}