@misc{indiciae889ebbba2099,
  title = {Multifrequency spectra of BL Lac objects},
  author = {Urry, C. M. and Kondo, Y. and Mufson, S. L. and Wandel, A.},
  year = {1988},
  url = {https://ntrs.nasa.gov/citations/19890007221},
  note = {Source identifier: 19890007221}
}