- Simpson, I.H.; Back, K.W.; McKinney, J.C.
- Attributes of Work, Involvement in Society, and Self-Evaluation in Retirement. Continuity of Work and Retirement Activities and Self-Evaluation.
- Simpson, I.H.;et al.;Eds.:"Social Aspects of Aging", Duke University Press, 1966, Durham, NC, USA, Chapter 3 & Chapter 6
Eligible for inclusion in findings archive
- No, no valid measure of happiness used.