The Index of the Viola da Gamba Society of Great Britain concentrated initially on English sources, which are now largely indexed, but is now indexing continental sources, both printed and in manuscript.
The Thesaurus Musicarum Latinarum (TML), is an online archive of music theory in Latin, which aims to give free access to and make searchable every known Latin text on music from the late antiquity to the seventeenth century, in multiple editions and in transcriptions from original sources.
The bibliographic project sets out to establish a German National Bibliography of 17th-century imprints. All German titles and all titles which are printed or published in the former German-speaking countries will be catalogued. Broadsheets are listed, musica practica (notations) and maps are excluded.
The RILM documents and disseminates music research worldwide. RILM Abstracts of Music Literature is a comprehensive bibliography of writings about music, featuring bibliographic citations, abstracts, and indexing. RILM Abstracts of Music Literature with Full Text expands and enhances a global bibliography of writings on music
An extensive bibliography by the Huygens-Fokker Foundation, part of a research project on microtonality. The Foundation library also contains a library of microtonal scores, books and other publications.