ONLINE REFERENCE SOURCES
Doctoral Dissertations in Musicology
"Doctoral Dissertations in Musicology (DDM) is an international database of bibliographic records for completed dissertations and new dissertation topics in the fields of musicology, music theory, and ethnomusicology, as well as in related musical, scientific, and humanistic disciplines." Provided by The American Musicological Society.
Folk Song Index
A project of Oberlin College, search by title or first line of traditional folk music.
Choral Public Domain Library
This Choral-Wiki page host the CPDL.
Digital Sheet Music Consortium
Access to online sheet music.
ONLINE REFERENCE BOOKS - E-BOOKS