History 18 Motion picture industry 11 Motion picture producers and directors 10 Screenwriters 5 Blacklisting of authors 4 Actresses 3 Investigation 3 more ... Manners and customs 3 Motion picture actors and actresses 3 Murder 3 Social life and customs 3 Water-supply 3 Women in the motion picture industry 3 Women screenwriters 3 AIDS activists 2 American literature 2 Art 2 Communism and literature 2 Engineers 2 Executives 2 Family 2 Gay studies 2 Gender studies 2 History and criticism 2 History, 19th Century 2 History, 20th Century 2 Immigrants 2 LGBT activism 2 Lesbian studies 2 Motion picture plays, American 2 less ...