The University of Omaha and the Internet Movie Database have both compiled lists of Hindi films, many of which date before 1980. Time Magazine has also published a list of Bollywood classics.
The University of Omaha's list of Hindi films is the most comprehensive of the three lists, although it contains both classic and contemporary films. However, the films' release dates are clearly marked throughout the list, so one can easily scroll through and find older works. The IMDb's list focuses specifically on classic Hindi cinema. The Time Magazine "Best of Bollywood" list includes the year, cast members and description of each film.