1. The National Center for Health Statistics, Washington, D.C. US Census Bureau Digest, Feb 1978, p 20.
2. Clark A: Stresses and Conflicts: Their Relevance to the Expanding Family, Maturational Crisis of Childbearing. Report of conference held at the University of Hawaii, 1971.
3. Pregnancy decisions: Locating the psychological factors;Steinhoff;Pacific Health,1979
4. Hypertensive disorders in pregnancy;DeAlvarez;Clin Obstet Gynecol,1973
5. Shields D: Maternal reactions to fetal monitoring. Am J Nurs December 1978.