1. A community study of smoking in pregnancy;Andrews;Br J Obstet Gynaecol,1972
2. Ultrastructure of the human placenta at term;Asmussen;Observations on placentas from newborn children of smoking and nonsmoking mothers. Acta Obstet Gynecol Scand,1977
3. Ultrastructure of human umbilical veins;Asmussen;Observations on veins from newborn children of smoking and nonsmoking mothers. Acta Obstet Gynecol Scand,1978
4. Arterial changes in infants of smoking mothers;Asmussen;Postgrad Med J,1978