1. Temporal relations between maternal rubella and congenital defects;Munro, N.D.; Sheppard, S.; Smithells, R.W.; Holzel, H.; Jones, G.;Lancet,1987
2. Hidden children;Thornes, R.; Cook, A.; Lamb, P.,1988
3. Population Censuses and Surveys. Smoking among secondary school children in 1986;Office of,1987