1. Significance of blood histaminase in pregnancy;Ahlmark;Lancet,1944
2. Observations on vital capacity during the last month of pregnancy and puerperium;Alward;Amer. J. Obstet. Gynec.,1930
3. The oxygen cost of breathing in dyspnoeic subjects are studied in normal pregnant women;Bader;Clin. Sci.,1959
4. The effect of maternal smoking on the infant birth weight;Bailey;New Zealand Med. J.,1970
5. In Medical Disorders in Obstetric Practice;Barnes,1962