Light, vision and seeing; a simplified presentation of their relationships and their importance in human efficiency and welfare. Luckiesh, Matthew, 1883- Vision. Lighting. QP475 .L778 19 535 LUL "Luckiesh-Moss visibility indicator" mounted on lining-paper. "References": p. 301-307. New York, Van Nostrand, 1944. 1944. 1944 Text xiv, 323 p. eng