The Field Guide to Sponsored Films

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"The Field Guide to Sponsored Films by Rick Prelinger describes 452 historically or culturally significant motion pictures commissioned by businesses, charities, advocacy groups, and state or local government units between 1897 and 1980. The annotated filmography features repository information for some 350 titles as well as links to works viewable online. Also included are an introductory essay and name and subject indexes."
Quoting The Field Guide to Sponsored Film Site.