John T. Soister Of Gods and monsters, A critical guide to Universal Studios' science fiction, horror, and mystery films, 1929-1939 Jefferson, N.C., 1999 |
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James Robert Parish The Great Cop Pictures Metuchen, N.J., & London, 1990 |
Larry Langman and Daniel Finn A Guide to American Crime Films of the Thirties Westport, Connecticut - London, 1995 |
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Larry Langman & David Ebner Encyclopedia of American Spy Films New York & London, 1990 |