- Why a duck?: visual and verbal gems from the Marx Brothers movies
- Publisher: Studio Vista, London
- Year of publication: 1972
- Physical description: 288 p : principalmente il ; 28 cm.
- Language: English
- Notes: Firmado
- Subjects: Marx (Hermanos) - Cinematografía / Cine / Firmado
- Related authorities: Anobile, Richard J. ed. / Marx, Groucho pr. / Shepard, Richard F. pr.
- Signature: BC-A-Why
