Groucho, Harpo, Chico and Sometimes Zeppo: A History of the Marx Brothers and a Satire on the Rest of the World Hardcover – September 15, 1973 by Joseph Adamson 
 
Joe Adamson an award-winning comedy film maker, has thoroughly searched through all the existing written material on the Marx Brothers and probed the momories of the Marxes' associates for frist-person accounts - to produce the first accurate chronicle of the incredible Marx Brothers.
 
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