International Index to Music Periodicals, Full Text Edition (IIMP)
IIMP Full Text is a music information resource with indexing, abstracts and selected full text from many sources, covering the scholarly to the popular. Offering the widest span of scholarship available, IIMP Full Text ranges from 1874 to the most recent issues.
Holdings: Dates vary.

RILM Abstracts of Music Literature
Covers all aspects of music, including historical musicology, ethnomusicology, instruments and voice, dance, and music therapy. If related to music, works in other fields, such as librarianship, literature, dramatic arts, visual arts, anthropology, sociology, philosophy and physics are included.
Holdings: 1969 to the present. Updated monthly.

Enhanced online version of the 29-volume print edition of the New Grove Dictionary of Music and Musicians, 2nd edition, also comprising the complete New Grove Dictionary of Opera. Contains scholarly articles on all aspects of music and includes links to images, digital sound, and related sites. Updated quarterly.

Also includes the Encyclopedia of Popular Music Online, the Oxford Dictionary of Music, and the Oxford Companion to Music.