1. Brazelton TB. Neonatal behaviour assessment scale. SIMP Monographs.Clin Dev Med No 50, London, William Heinemann Medical Books, 1973.
2. Collingwood J, Alberman E. Separation at birth and mother-child relationship.Dev Med Child Neurol 1979; 21: 608–618.
3. Cohen SE, Beckwish 1, Parmelee AH. Receptive language development in preterm children as related to caregiver child interaction.Pediatr 1978; 61–20
4. Prasad BG. Changes proposed in the social classification of Indian families.J Indian Med Assoc 1970; 55:198–199.
5. Telzrow RW, Synder DM, Tronick E, Als H, Brazelton TB. The behaviour of jaundiced infants, undergoing phototherapy.Dev Med Child Neurol 1980; 22: 317–326.