@misc{indiciae4e94ffd70724,
  title = {Associations between quasi-stellar objects and galaxies},
  author = {Burbidge, G. and Hewitt, A. and Narlikar, J. V. and Gupta, P. Das},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19910030486},
  note = {Source identifier: 19910030486}
}