ڈاکڑ ناصر سامان creator text Islamabad HEC 2008 monographic xii, 218 p. 28 cm. Mental retardation Special education-Pakistan Neurofibromatosis Tuberous selerosis Metabolic disorder Down syndrome Klienfilter syndrome Macrocephaly IIMC 614.5 SAL 9786964171357 (pbk)