1. Steihm ER: Fetal defense mechanisms.Am J Dis Child 129:438, 1975
2. Singh M, Maneriker S, Malaviya AN, Premavathi RS, Kumar R: Immunological status of newborn babies.Indian Pediatr 15:563, 1978
3. Handzel ZT, Levin S, Dolphin Z, Schlesinger M, Hahn T, Altman Y, Shneyour A, Trainin N: Immune competence of newborn lymphocytes.Pediatrics 64:491, 1980
4. Dacie JV, Lewis SM:Practical haematology. Churchill Livingstone, London, 1975
5. Kolmer JA, Boerner F:Approved Laboratory Technique. Fourth Edit, Appleton Century Crofts, New York, 1945