Frank Lloyd Wright Drawings: Masterworks fron the Frank Lloyd Wright Archives - Imperial Hotel, scheme 2 - FLLW Archive Drawing Number 1509.674: Section (p. 271)

Drawing Citation

Drawing 674 - Detail section of Banquet Hall and three floors below
Imperial Hotel, scheme 2 (is cited in)
Frank Lloyd Wright Drawings: Masterworks fron the Frank Lloyd Wright Archives (published in)