The correlation of line strength with QSO luminosity and redshift from composite spectra
Proceedings article published in 2003 by
E. Corbett,
S. Croom 
,
B. Boyle,
H. Netzer ,
N. Loaring,
L. Miller,
P. Outram,
T. Shanks ,
R. Smith
,
B. Boyle,
H. Netzer ,
N. Loaring,
L. Miller,
P. Outram,
T. Shanks ,
R. Smith
