1. Campbell M: Natural history of patent ductus arteriosus. Br Heart J 30: 4, 1968.
2. Campbell M: Natural history of atrial septal defect. Br Heart J 32: 820, 1970.
3. Campbell M: Natural history of coarctation of the aorta. Br Heart J 32: 633, 1970.
4. Edwards JE, Carey LS, Neufeld HN, Lister RG: “Congenital Heart Disease: Correlation of Pathologic Anatomy and Angiocardiography.” Vols I and II W.B. Saunders, Philadelphia, 1965.
5. Gottsman MS, Beck W, Barnard CN, O’Donovan TG, Schrire V: Results of repair of tetralogy of Fallot. Circulation 40: 803, 1968.