Thursday, March 15, 2018

Cumming E., Newell D.S.: Disengagement - A tentative theory of aging. Sociometry 23: .23-24, 1960.

Cumming E., Henry W.: Growing Old: The process of disengargement. Basic Books, New York, 1961.

Cumming E.: Further thoughts on the theory of disengagement, UNESCO International Science Journal 15: 377-393, 1963.

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