Wright Studies, Volume Two: Fallingwater and Pittsburgh - Research Laboratory for S. C. Johnson and Son Company - FLLW Archive Drawing Number 4401.011: Elevations (p. 96, fig. 15)

Drawing Citation

Drawing 011 - North elevation, scheme C
Research Laboratory for S. C. Johnson and Son Company (is cited in)
Wright Studies, Volume Two: Fallingwater and Pittsburgh (published in)