Duck Soup
Overview  |  Photographs  |  Cast and credits
Year:1933
Running time:68 minutes
Country:United States
Language:English

Imdb link
Chico Marx, Groucho Marx - Duck Soup
Books with substantial mentioning of Duck Soup
Wayne Koestenbaum
The anatomy of Harpo Marx
Berkeley, 2012

David Thomson
Have you seen?, A personal introduction to 1,000 films
New York, 2008

Roger Ebert
The Great Movies
, 2003

Tom Pendergast, Sara Pendergast (eds.)
International Dictionary of Films and Filmmakers, 1. Films
Detroit/New York/San Francisco/London/Boston/Woodbridge, CT, 2000

Kathryn Bernheimer
The 50 Funniest Movies of All Time, A Critic's Ranking
Secaucus, NJ, 1999

Glenn Mitchell
The Marx Brothers Encyclopedia
London, 1996

Peter van Gelder
Offscreen Onscreen, The inside stories of 60 great films
London, 1990

Frank N. Magill (ed.)
Magill's Cinema Annual 1990, A Survey of the Films of 1989
Pasadena, California; Englewood Cliffs, New Jersey, 1990

Danny Peary
Cult Movies, The Classics, the Sleepers, the Weird, and the Wonderful
New York, 1989