1) "Grove" originated as a print dictionary (encyclopedia really) that has been in continuous publication since 1878 in many updates and editions. Accessible in two versions:

The New Grove dictionary of music and musicians.  29 volumes. In print.

Grove Music Online comprises the full text of The New Grove Dictionary of Music and Musicians, The New Grove Dictionary of Opera, and 4 others.  Updated periodically.

"Grove" in either print or online form is "the first stop for music research."

In English. Extensive bibliographies and composer "works lists".  Biographies and subjects; arranged alphabetically.  Contains extensive articles on the music of geographical locations. Grove is fairly up-to-date and global in its representation but you will want to add articles and websites to your bibliography that could be more up-to-date.

Examples:    Beyonce  Jimi Hendrix Jennifer Lopez Fela Kuti     Miriam Makeba   Bob Marley   Florence Price   Taylor Swift    Kanye West 

2) "MGG"

Die Musik in Geschichte und Gegenwart : allgemeine Enzyklopädie der Musik.  27 volumes. In print.

In German. Extensive bibliographies and composer works lists.  Arranged in 2 sections: Sachteil (subjects) and Personenteil (biographies).  Arranged alphabetically in both sections.