Warncke, Carsten-Peter. The ideal as art, de stijl 1917-1931 / Carsten-Peter Warncke. - Benedikt Taschen : Koln, c1990. - 216 p. : il., fot. ; 30 cm ISBN: 3822805475 Subjects--Index Terms: Pintura moderna-siglo Siglo XX Arquitectura