WorldCat Union Catalog
WorldCat is a union catalog of almost 500 million records in 483 languages, representing over 3 billion physical and digital items in libraries worldwide.
Use WorldCat to locate books, entire journals, dissertations and theses, videos, audio recordings, manuscript materials, and other publication types.
Items identified in WorldCat may often be borrowed from owning libraries using the ILLiad Interlibrary Loan service.
WorldCat is available in three versions: