The best way to find vocal scores and other sheet music is to use the main library catalogue. Here are some steps that can help:
Make sure to select the 'Find Books' radio button, as this will limit your search to scores, which are shelved with the library's book collecton
Try multiple search terms. It helps to start with the title of the musical, but if that doesn't work, trying search for the lyricist or composer too.
Looking to browse the library's collection of vocal scores? With 'find books' selected, click on advanced search. Then select 'subject' from the drop-down menu, and browse for the words 'Musicals Vocal scores'. Viola! Scores at your fingertips.
Large and expanding collection of both in-copyright and public domain editions and manuscripts of music scores, mostly from the classical repertory. Includes works by major and lesser-known composers spanning the Renaissance to the 21st century in full, study, and piano-vocal scores, and piano reductions.
The Contemporary Music Score Collection is published by the UCLA Music Library. The collection includes the digital, open access scores from the Contemporary Score Edition series, the first open access edition of new music published by a library.