1. Guide to Clinical Preventive Services,1989
2. The periodic health examination;Can Med Assoc J,1979
3. Evaluating the effects of care during pregnancy and childbirth;Chalmers,1989
4. Effective Care in Pregnancy and Childbirth,1989
5. A critique of methodology in studies of anticoagulant therapy for acute myocardial infarction;Gifford;New Engl J Med,1969