Kelvin Smith Library
There are many sources that can be used to find reviews of films. Here are the most common:
The American Film Institute Catalog is the premier, authoritative resource of American film information for the years 1893–1973.
The main database for film Film and Television Literature Index generally includes a wealth of references to reviews of films from popular sources such as Variety and Film Comment to academic film journals like Literature Film Quarterly.
The New York Times Historical Archive is a database containing full page images of every New York Times issue from 1851 through 2006 (this ending date moves forward, so that it includes everything published in the NYT up to three years ago.) This rich database allows you to search for film reviews published in the times, as well as film advertisements, which can also be quite valuable to research.
In addition to the New York Times archive, we have access to the archives of the Washington Post and Wall Street Journal, which also have film reviews.
The CineFiles Pacific Film Archive collection is a rich resource for finding film reviews.
Local interest! The Cleveland Plain Dealer reviewed and reviews films as well. We have access to the archive of the Plain Dealer: Historical archive, 1845-1991, and to content from 1991 to the present via NewsBank InfoWeb (look for the shortcut link to the Cleveland Plain Dealer).
It's best to search for the title of your film as a keyword, using quotes to indicate a phrase search. So: "Gone with the wind."
The print reference series Selective Film Criticism, held at the Cleveland Institute of Art Library, includes reviews of films from 1921-1950.
The two volume Film Review Index covers films from the years 1882-1985.
To find individual monographs primarily containing film reviews (and generally those of a single author), use the subject heading Motion Pictures -- Reviews.
For more recent films, don't forget about Academic Search Complete.