1. The oxygen cost of breathing in dyspnoeic subjects as studied in normal pregnant women;Bader;Clin. Sci.,1959
2. Maternal and physiologic changes during pregnancy and anesthesia;Bonica,1974
3. Heart Disease and Pregnancy: Physiology and Management;Burwell,1958
4. Readjustments in cardiac output and gas exchange during onset o exercise and recovery;Cerretelli;J. Appl. Physiol.,1966
5. Pulmonary function in pregnancy;Cugell;Am. Rev. Tuberc.,1953