Music literature databases and indexes

• Academic Charts Online (ACO)
• AES: Audio Engineering Society
• Bibliographie des Musikschrifttums Online
• Canadian Music Periodical Index
• Europeana
• Francophone Music Criticism 1789-1914
• Gallica, Bibliothèque nationale de France digital library
• Hathi Trust
• International Index to Music Periodicals (IIMP)
• Internet Archive
• JSTOR: Advanced Search (or Basic Search)
• Music and Dance Reference
• Music Index Online
• Musicologie.org : Références en musicologie
• Opening Night! Opera & Oratorio Premieres
• RILM Abstracts
• RIPM: Retrospective Index to Music Periodicals (1800-1962)
• RIPM Online Archive (1800-1950: full-text)
• Rock's Backpages

Dissertations and theses

• eScholarship@McGill
  A digital repository for the research created at McGill including theses.
• ProQuest Dissertations and Theses - Full Text
• Open Access Theses and Dissertations (OATD)
• Doctoral Dissertations in Musicology-Online
• Music Theory Online Dissertation Index
• Theses Canada Portal
• Center for Research Libraries (CRL) catalogue
  CRL is a consortium of North American universities, colleges, and independent research libraries, of which McGill is a member. Search for theses and dissertations to be ordered via Interlibrary Loan or document delivery.
• EThOs: [UK] Electronic Theses Online Service [hosted by the British Library]
• Index to Theses [Great Britain and Ireland]
• SUDOC (Système universitaire de documentation) Catalogue (France)
  "Sudoc's mission is to list all dissertations/theses produced in France."
• Theses.fr
  Contains records for over 60,000 theses from all disciplines proposed in French institutions of higher education since 2001, including several thousand full-text documents. Gradually records are being added retrospectively to 1985.
• Dissertationsmeldestelle der Gesellschaft für Musikforschung
  Index to primarily Austrian, German, and Swiss dissertations in musicology and music education
• Other online dissertation databases and indexes