Search for any of the books (both print and electronic/online books) and media (DVDs, music recordings/scores, etc.) that are in Campbell Library.
Some interesting books about composition studies are available online as of 2009. The University of Pittsburgh is undertaking a digitization program that promises more titles in a variety of fields in the future.
This link provides access to a collection of e-books in multiple areas, some of which may be useful for communication research.