Frank Lloyd Wright, The Heroic Years 1920 - 1932 - "Century of Progress" Three Designs for the Chicago World's Fair of 1933 - FLLW Archive Drawing Number 3103.002: Skyscraper for Century of Progress, Chicago Worlds Fair, 1931 (p. 219)

Drawing Citation

Drawing 002 - Skyscraper for Century of Progress, Chicago Worlds Fair, 1931 - Elevation
"Century of Progress" Three Designs for the Chicago World's Fair of 1933 (is cited in)
Frank Lloyd Wright, The Heroic Years 1920 - 1932 (published in)