WorldCat's a union catalog which itemizes the collections of more than 71,000 libraries which participate in the Online Computer Library Center (OCLC) global cooperative. It's built and maintained collectively by the participating libraries from more than ninety countries. Created in 1971, it contains more than 90 million different records pointing to over 1.2 billion physical and digital assets in more than 360 languages, as of November 2007. It's the world's largest bibliographic database. OC… (More on Worldcat)