@misc{indiciaee50820312a37,
  title = {Spectroscopy of two BL Lacertae objects},
  author = {Urry, C. M. and Holt, S. and Kondo, Y. and Mushotzky, R. F. and Hackney, K. R. H. and Hackney, R. L.},
  year = {1982},
  url = {https://ntrs.nasa.gov/citations/19820023306},
  note = {Source identifier: 19820023306}
}