In the library search box type the song title (in quotation marks if it's a phrase or more than one word) and do the search. When you get your search results, look over in the left margin, and under Source Type click on Music Scores. This will filter your results to list just the scores. You can further filter your results by Location to see only what's available at the John L. Haar (MacEwan) Library.
The collection contains over 4000 CDs and is growing rapidly. It is organized using the Library of Congress Classification System. To browse the physical collection, use the following guide:
Jazz - M 1366 (1700+ CDs)
Musicals - M 1500 (300+ CDs)