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Luminosity calibration of low redshift quasars

Wampler, E. Joseph, author.
Santa Cruz, California : University of California ; [Washington, D.C.], National Aeronautics and Space Administration, [1983] 1983

The X-ray properties of high redshift, optically selected QSOs

Anderson, Scott F.
Seattle, Wash. : Dept. of Astronomy, University of Washington ; [Washington, D.C. : National Aeronautics and Space Administration], 1985. 1985