With LUX, you can search holdings across all of Yale's cultural heritage collections (libraries, archives, and museums). Search results can include books, manuscripts, archival records, art objects, specimens, artifacts, and more.
WorldCat is the world's largest library catalog. Contains millions of records of items owned by libraries around the world. It includes: books, films and slides, journals and newspapers (NOT individual articles), manuscripts, maps, musical scores, sounds recordings, computer files and videotapes.
The CRL Catalog is the online catalog of the Center for Research Libraries in Chicago. It focuses on hard-to-find materials including: archival materials, newspapers and periodicals (foreign & domestic, specialized), foreign doctoral dissertations, U.S. state documents, US and foreign academic publications.