John T. Soister Up from the Vault, Rare Thrillers of the 1920s and 1930s Jefferson, North Carolina, and London, 2004 |
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James Robert Parish and Michael R. Pitts The Great Detective Pictures Metuchen, N.J. & London, 1990 |
Ken Wlaschin Silent mystery and detective movies, A comprehensive filmography Jefferson, N.C., 2009 |