Book Illustration, Karl Gerstner: Color Sound 15, Color pattern, 1973 N7153.G4 L94 Related Objects Book Illustration, Interaction of Color, Plate VIIII-I, 1963 Book Illustration, Farbige Räume und Bauten (Color in Interior Decoration), Axonometric Drawing of an Interior, plate 30, ca. 1929 Book Illustration, Studies in Design, Ceiling Pattern, plate XXX, 1876
Book Illustration, Interaction of Color, Plate VIIII-I, 1963 
Book Illustration, Farbige Räume und Bauten (Color in Interior Decoration), Axonometric Drawing of an Interior, plate 30, ca. 1929 
Book Illustration, Studies in Design, Ceiling Pattern, plate XXX, 1876