@misc{indiciaeb17af98dbe42,
  title = {Measuring concave diffraction grating efficiencies at grazing incidence},
  author = {Hunter, W. R. and Prinz, D. K.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19780033089},
  note = {Source identifier: 19780033089}
}