522,927 SLEEP Sleep and the maturing nervous system. Based on a Symposium "The Maturation of Brain Mechanisms Related to Sleep Behavior", held at Boiling Springs, Pennsylvania, June 21-24, 1970, sponsored by The National Institute of Child Health and Human Development, National Institutes of Health. Ed. by Caimine D. Clemente, Dominick P. Purpura, Florence E. Mayer. New York 1972 Academic Press 8° s. XVIII, 47O, ilustr.