He has appeared in eight films that have been selected for the National Film Registry by the Library of Congress as being "culturally, historically or aesthetically" significant: To Kill a Mockingbird (1962), Bullitt (1968), M.A.S.H. (1970), The Godfather (1972), The Conversation (1974), The Godfather: Part II (1974), Network (1976) and Apocalypse Now (1979).