@misc{indiciae700819576715,
  title = {Spectral shifts in quasi-stellar objects.},
  author = {Jokipii, J. R. and Noerdlinger, P. D. and Woltjer, L.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19670035592},
  note = {Source identifier: 19670035592}
}