@misc{indiciae9f2abaf8ee72,
  title = {Wavelength errors in spectrographs. I - The effect of surface irregularities in camera mirrors.},
  author = {Tull, R. G.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690064200},
  note = {Source identifier: 19690064200}
}