"HCI in the large is an interdisciplinary area. It is emerging as a specialty concern within several disciplines, each with different emphases: computer science (application design and engineering of human interfaces), psychology (the application of theories of cognitive processes and the empirical analysis of user behavior), sociology and anthropology (interactions between technology, work, and organization), and industrial design (interactive products)."
--From ACM SIGCHI Curricula for Human-Computer Interaction at http://old.sigchi.org/cdg/cdg2.html
This guide provides entryways into several of these disciplines.
Quick Search is the equivalent to the library's catalog, except that it includes much more. However, that's where you want to go if you're looking for books (both online and print), journals, media, and other materials the library owns.