PN 2000 .B489
Billboard
Online (1991- ). Lexis Nexis
ML 3469.J69
Journal of Popular Music Studies
Online (1988- ). Blackwell Synergy
ML 3533.8 .N496
NME (New Musical Express)
Online (1991- ). Lexis Nexis
ML 5.P66
Popular Music
Online (2006- ) Cambridge. (1981-2006) JSTOR.
ML 1.P819
Popular Music and Society
Online (1971- ) Taylor and Francis
Popular Musicology Online
Online: Popular Musicology
The All Music guides and Rough Guides provide general information and lists of artists and songs for many genres of popular music. These are all in the reading room Reference stacks.
Find the rest in the UCLA Library Catalog by searching "all music guide" as Title (start of) or "Rough Guide music" as a Title search.