His Art, architecture, and civilization, 1968.

Chicago tribune WWW site, viewed Dec. 12, 2019: obituary dated Dec. 10, 2019 (Franz Schulze; prolific Chicago art critic, educator and biographer of Mies van der Rohe and Philip Johnson; died Monday [Dec. 9] at the Radford Green assisted living facility in north suburban Lincolnshire, aged 92; had lived in Lake Forest; born 1927, Uniontown, Pa.)