Thomae, H. &Lehr, U. (1986). Stages, crises, conflicts and life Span development. In: A. B. Sorensen, F, F. Weinert & L.
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Thomae, H. &Lehr, U. (1986). Stages, crises, conflicts and life Span development. In: A. B. Sorensen, F, F. Weinert & L. Sherrod. Human development the lefe Course, Erlbaum, Hillsdale, pp 429-444
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