Piaget's Concept of Classification: A Comparative Study of Socially Disadvantaged and Middle-Class Young Children

Autor:	Lavatelli, Celia B., Jones, R. Stewart
Zdroj:	Child Development, 1971 Sep 01. 42(3), 919-927.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/1127458 Zobrazit plný text záznamu