Library of Congress call numbers for books about music start with the letters ML or MT. ML stands for music literature, or literature about music. MT stands for music teaching or music theory.

The following call numbers show good places to browse for books about the viola:

How to play the viola, MT 280

Viola method books MT 285

History of the viola, ML 900

Viola bibliography, ML128 .V36--music reference shelves

Viola discography (lists of recordings), ML156.4 .V7--music reference shelves