Persha, Amar Jyothi Positioning and stimulation activities for infants and young children with motor problems / Amar Jyothi Persha and K. Venkata Subba Reddy . - Calcutta: National Institute for the mentally handicapped, 2003. - 96p.; 26cm. Includes bibliographical references. ISBN: 190 Dewey Class. No.: 371.9 PER