POLAR - Heterick Library Catalog
Most of HML's music scores are in the oversize book collection on the west end of the third floor. There is a limited selection of study scores in the regular stacks, opposite the oversize stacks using the same call numbers. General books about music are between 780 and 781.9 while music scores are between 782 and 788.9.
When searching for scores using the library catalog, you can change "View Entire Collection" to "Scores."