@misc{indiciae6099785a1415,
  title = {Spectroscopic observations of 22 quasi-stellar objects.},
  author = {Burbidge, E. M. and Strittmatter, P. A.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720049467},
  note = {Source identifier: 19720049467}
}