1. Historical background of the treatment of placenta praevia;Marr;Bull Hist Med,1941
2. Placenta praevia;Bell;Trans Edinb Obstet Soc,1878
3. The diagnosis of placenta praevia with special reference to the employment of X-rays for this purpose;Kerr;Trans Edinb Obstet Soc,1933
4. Placenta praevia, with vasa praevia: caesarean section;McNair;Proc R Soc Med,1921
5. A case of placenta accreta;Forster;Can Med Assoc J,1927