1. New assessment of the effects of birth order and socioeconomic status on birth weight;Dowding, V.M.;Br MedJ,1981
2. Better perinatal health;Chalmers, I.;Shanghai. Lancet,1980
3. Comparison of neonatal management methods for very low birthweight babies;Steiner, E.S.; Maddock, C.R.;Br MedJr,1981
4. Area variations in infant mortality;Bradshaw, J.; Edwards, H.; Lawton, D.;7 Epidemiol Community Health,1982
5. Statistical methods;Snedecor, G.W.; Cochran, W.C.,1978