Reading aids for the partially sighted : a systematic classification and procedure for prescribing /

by Sloan, Louise L (Louise Littig), 1898-
Published 1977

The effect of intensity of light, state of adaptation of the eye, and size of photometric field on the visibility curve; a study of the Purkinje phenomenon

by Sloan, Louise L (Louise Littig), 1898-, Sloan, Louise L., 1898-, Sloan, Louise L., 1898-
Published 1928