1. Commission on Population Growth and the American Family, Population and the American Future: 97 (1972).
2. Vital Statistics of the United States 1968 1970 1
3. Bumpass, L. L., The Later Years of Childbearing: 93 (1970).
4. CLARE, J.E., MILBANK MEM FUND Q 29: 440 (1951).
5. DINITZ, S, MARRIAGE FAM LIVING 16: 128 (1954).