WorldCat

WorldCat, also known as OCLC First Search, is a union catalog of North American and some European library holdings.

It includes records of more than 50 million books, periodicals, maps, microforms, web sites, etc.

Many WorldCat users then request materials by InterLibrary Loan. Harvard's Interlibrary Loan Department is located in Widener Library Rm. G-30, tel. 617.495.2972, illweb@fas.harvard.edu.