found: Work cat.: BL Lac objects : proceedings of a workshop held in Como, Italy, September 20-23, 1988, c1989(BL Lacertae objects; BL Lacs)
found: Facts file dict. astron.(BL Lac objects)
found: Encyc. astron. astrophysics(Optically violent variable galaxy showing featureless continuum with strong ultraviolet emission)
found: Guinness book astron.(identified as a radio source)
found: McGraw-Hill encyc. astron.(type of active galaxies)
found: INSPEC(uses for:BL Lac-type objects; Blazars; Lacertids)
found: NASA.
found: INIS:Thes.
notfound: Random house
