WorldCat is a union catalog that searches across the collections of many libraries both in the U.S. and worldwide. There is both a subscription version of the catalog from FirstSearch, as well as a freely available web version. However, WorldCat does not list the holdings of all international collections and archives, so researchers are encouraged to also explore the individual catalogs and finding aids of relevant institutions.
Conduct a "subject" search in UC Library Search with broad terms or the names of major filmmakers. Examples are below: