1. Williams' Obstetrics;Hellman,1971
2. Williams' Obstetrics;Hellman,1971
3. Health care for women: present deficiencies and future needs;Willson;Obstet. Gynec.,1970
4. History of material mortality study committees in the United States;Marmol;Obstet. Gynec.,1969
5. Health Progress in the United States: 1900–1960;Lerner,1963