International Association for the Evaluation of Educational Achievement (IEA): The Mathematics Study

Autor:	Postlethwaite, T. N.
Zdroj:	Journal for Research in Mathematics Education, 1971 Mar 01. 2(2), 69-103.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/748638 Zobrazit plný text záznamu