1. Parental smoking empirically related to pregnancy outcome;Underwood;Obstet Gynecol,1967
2. The incidence of preeclamptic toxaemia in smokers and non-smokers;Duffus;Lancet,1968
3. Smoking in pregnancy, maternal blood pressure, pregnancy outcome, baby weight and growth, and other related factors;Russell;Br J Prev Soc Med,1968
4. A prospective study of smoking and pregnancy;Kullander;Acta Obstet Gynecol Scand,1971
5. A community study of smoking in pregnancy;Andrews;J Obstet Gynaecol Br Commonw,1972