Wayne Koestenbaum The anatomy of Harpo Marx Berkeley, 2012 |
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Glenn Mitchell The Marx Brothers Encyclopedia London, 1996 |
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Mark Conway and Mark Ricci The Films of Marilyn Monroe Secaucus, NJ, 1972 |
Harald Mühlbeyer, Marxismus, Tendenz Harpo, in: epd Film, nr. 11, 2009 pp. 53 (DVD review) |