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The floating pig that became a sign of protest
Battersea: The Pink Floyd pig that terrorised London, Local Features, News, Battersea Nub News
The Gem of the Idea: Hipgnosis' Aubrey Powell Looks Back at His Iconic Album Designs (Part One)
Pink Floyd The Official Site
Pink Floyd's “Animals”: The Story Behind the Album Cover, by David Deal
Best Pink Floyd Album Covers: 20 Artworks Ranked And Reviewed - Dig!
Hipgnosis, the Album Artists Who Made Pink Floyd's Pig Fly - The New York Times
Hipgnosis' Album Covers From Pink Floyd to Led Zeppelin
Wish you were here? V&A museum puts Pink Floyd on show
PINK FLOYD Meddle reviews
Anton Corbijn on the incredible story of album sleeve designers Hipgnosis - Radio X