Music Theatre materials are located in the Music & Dance Library.
Books are at these call numbers:
Scores of musicals are at these locations:
Click on the Scores tab above for online sources of scores and sheet music. Here's one:
The Oxford companion to the American musical : theatre, film, and television by 
Encyclopedia of Musical Theater by 
A Chronology of American Musical Theater by 
The off Broadway Musical, 1910-2007
The New Broadway Song Companion by 
