Frank Lloyd Wright, The Heroic Years 1920 - 1932 - Research Laboratory for S. C. Johnson and Son Company - FLLW Archive Drawing Number 4401.011: Elevations (p. 219)

Drawing Citation

Drawing 011 - North elevation, scheme C
Research Laboratory for S. C. Johnson and Son Company (is cited in)
Frank Lloyd Wright, The Heroic Years 1920 - 1932 (published in)