1. Nutrition in Pregnancy and Lactation. 3rd ed;Worthington-Roberts,1985
2. Childbirth after 30? Take your time… but hurry;Jacoby;McCalls,1982
3. Nutrition and the older primigravida;Weigley;J Am Diet Assoc,1983
4. Pregnancy and delivery in women aged 40 and over;Kajanoja;Obstet Gynecol,1978
5. Differential fertility in the United States: 1979-1980;O’Connell;Fam Plann Perspect,1982