1. Constipation during pregnancy: Incidence and methods used in its treatment in a group of Cambridgeshire women;Anderson;Health Visitor,1984
2. Constipation during pregnancy: Dietary fibre intake and the effect of fibre supplementation;Anderson;Human Nutrition: Applied Nutrition,1985
3. Williams obstetrics;Cunningham,1996
4. Statistical methods for rates and proportions;Fleiss,1981
5. The pharmacological basis of therapeutics;Hardman,1996