One generally thinks of dictionaries as books defining language, and encyclopedias as books providing explanations, histories and biographies. But when a subject is more specialized, for all practical purposes they become indistinguishable. A book described as a dictionary may have more extensive biographies and plot summaries than a book described as an encyclopedia. They all provide quick sources of information and explanations.
Examples of Subject Headings for Searching Orbis
Selected Film Dictionaries and Encyclopedias
Cinema studies: the key concepts.
Critical dictionary of film and television theory.
Dictionary of film terms: the aesthetic companion to film art.
Encyclopedia of British film.
Encyclopedia of early cinema.
Encyclopedia of ethnic groups in Hollywood.
Encyclopaedia of Indian cinema.
The film encyclopedia.
The film studies dictionary.
Historical dictionary of French cinema.
Hutchinson pocket dictionary of cinema.
The International Dictionary of Films and Filmmakers.
New York Times Encyclopedia of Film.
Schirmer encyclopedia of film.