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The Music of the Marx Brothers: A Bio-Discography of the Works of Groucho, Harpo, Chico, Gummo, and Zeppo Marx by Michael A. Yahn |
| Groucho, Harpo, Chico and Sometimes Zeppo: A History of the Marx Brothers and a Satire on the Rest of the World (A Touchstone book) by Joe Adamson | |
| Groucho, Harpo, Chico, and Sometimes Zeppo; a Celebration of the Marx Brothers by Joe Adamson | |
| Groucho, Harpo, Chico and Sometimes Zeppo: A Celebration of the Marx Brothers by Joe Adamason | |
| Bob Hope Show: Guest Star Chico Marx | |
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Cosi Cosa "A Night At the Opera" (Cover Photo: Groucho Marx, Chico Marx, Harpo Marx) by Ned Washington, Bronislaw Kraper, and Walter Jurmann |
| Groucho, Harpo, Chico and Sometimes Zeppo A Celebration of the Marx Brothers by Joe Adamson and many B/W Photos Many |