WorldCat (FirstSearch interface, recommended for library staff)
WorldCat.org (Recommended for all other users)
WorldCat is the Online Computer Library Center's (OCLC) online "union catalog"; that is, its database of books and other materials held in more than 10,000 academic, public, special and national libraries around the world. Use WorldCat to locate materials outside of Yale, in almost any area of study, or to locate items in specific libraries and research collections. WorldCat provides catalog records for books, maps, sound recordings, musical scores, films, archives, and computer files held in research, corporate, and public libraries, as well as museums, archives and historical societies. All searches may be easily printed, downloaded or e-mailed directly to you.
NEW ! Click on the Yale links icon and then on the link for submitting an Interlibrary Loan request to obtain items that Yale does not own.