The Drawings of Frank Lloyd Wright: 5 May thouugh 6 June 1987 - Solomon R. Guggenheim Museum - FLLW Archive Drawing Number 4305.060: Plan Of Fourth Level (p. 4, fig. 25)

Drawing Citation

Drawing 060 - Plan Of Fourth Level - Floor plan of fourth level
Solomon R. Guggenheim Museum (is cited in)
The Drawings of Frank Lloyd Wright: 5 May thouugh 6 June 1987 (published in)