// todo need optimize like in event.jsp. Add indexing or not indexing this page. Jean Piaget (26 Feb 1896 Jahr – 23 Jun 1980 Jahr) (Band der Zeit)

Jean Piaget (26 Feb 1896 Jahr – 23 Jun 1980 Jahr)

Kehityspsykologi ja tietoteoreetikko
Vaiheteoria, geneettinen epistemologia

8 Nov 2018

26 Feb 1896 Jahr

23 Jun 1980 Jahr

~ 84 years

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