Secondary source, noun
Any published or unpublished work that is one step removed from the original source, usually describing, summarizing, analyzing, evaluating, derived from, or based on primary source materials... —definition from the Online Dictionary for Library and Information Science
The Library can't own or subscribe to every piece of research ever created...that's why we have interlibrary loan!
If you need to use an article or book not in the library's collection, place an interlibrary loan request. The University Library can borrow materials from libraries across the globe.