1. Ministry of Health: Interim Report of Departmental Committee on Maternal Mortality and Morbidity His Majesty's Stationery Office 1930 page21.
2. PROGNOSIS
3. Cardiac Disease in Pregnancy and Labour;FitzGibbon G.;The British Medical Journal,1927
4. BrowneF. J.: “Antenatal and Postnatal Care” Second Edition 1937 page341.
5. HEART DISEASE WITH NORMAL RHYTHM COMPLICATING PREGNANCY A SERIES OF ONE HUNDRED CASES