The Drawings of Frank Lloyd Wright: 5 May thouugh 6 June 1987 - Research Laboratory for S. C. Johnson and Son Company - FLLW Archive Drawing Number 4401.011: Elevations (p. 3, fig. 20)

Drawing Citation

Drawing 011 - North elevation, scheme C
Research Laboratory for S. C. Johnson and Son Company (is cited in)
The Drawings of Frank Lloyd Wright: 5 May thouugh 6 June 1987 (published in)