Lantern is a search engine for the books, periodicals, and catalogs contained in the Media History Digital Library. If you are a fan or student of pre-1970s American film and broadcasting, this looks like a goldmine. Here are some of the periodical titles and the years available:
Variety 1905-1926
Photoplay 1914-1943
Movie Classic 1931-1937
Home Movies and Home Talkies 1932-1934
Talking Machine World 1921-1928
(via candler blog)