1. The social forces in later life;Atchley,1972
2. Symptomatic measurement of age;Atchley;The Gerontologist,1973
3. Life graphs: Aging and cohort effects;Back;Journal of Gerontology,1970
4. Life course and social structure;Cain,1964
5. The growing importance of legal age in determining the status of the elderly;Cain;The Gerontologist,1974