1. Limit of fetal viability;Milner, R.D.G.; Beard, R.W.;Lancet,1984
2. Growth and development of infants weighing less than 800 grams at birth;Bennett, F.C.; Robinson, N.M.; Sells, C.J.,1983
3. Annual reports;Roberton, N.R.C.,1981
4. Trends in prevalence and survival of very low birthweight infants, England and Wales 1983-7;Alberman, E.; Botting, B.;Arch Dis Child,1991
5. Changing two year outcome of infants weighing 500-999 grams at birth. A hospital study;Kitchen, W.H.; Doyle, L.W.; Ford, G.W.;Jf Pediatr,1991