General works of reference

Oxford Music Online: GROVE Dictionary of Music and Musicians (www.kb,nl)

Oxford Art Online (via www.kb.nl)

MGG: Musik in Geschichte und Gegenwart: library RUG

Cambridge Histories Online (via www.kb.nl) several volumes on music

Oxford Reference Online (via www.kb.nl)

Encyclopaedia Britannica (www.britannica.com)

Books

Portals en data banks

JSTOR Arts & Sciences (www.kb.nl)

RILM Abstracts of Music Literature (via mediatheek Hanze)

Project Muse (via www.kb.nl)

www.scholar.google.com 

 

Ebooks

Ebook library (via www.kb.nl)

OAPEN Directory of Open Access Books (via www.kb.nl)

Catalogs

www.worldcat.org 

General suggestions of RUG university about searching for literature and data

https://www.rug.nl/library/where-can-i-find/