Persha, Amar Jyothi Visual Stimulation activities for infents and toddlers : aguide to parents and caregivers / Amar Jyothi Persha and K.R. Nawvi . - Andhra Pradesh: National Institute for the mentally handicapped, 2004. - 79p.; 23cm. Includes bibliographical references. ISBN: 8189001027 Dewey Class. No.: 371.9 PER