The Index of American Design / Introd. by Holger Cahill. Christensen, Erwin Ottomar. Index of American Design. Decoration and ornament United States. Art, American. NK1403 .C5 740 CHI Bibliography: p. 219-221. New York : Macmillan, 1950. 1950. 1950 Text xviii, 229 p. : eng United States.