Joseph F. Hennawi UC Berkeley & OSU October 3, 2007 Xavier Prochaska (UCSC) Quasars Probing Quasars.
Quasars Probing Quasars Joseph F. Hennawi Berkeley Hubble Symposium April 20, 2006 z = 2.53 z = 2.44 f/g QSO b/g QSO RR
