Measurement of Growth and Efficiency in Arithmetic (Concluded)

Autor:	Courtis, S. A.
Zdroj:	The Elementary School Teacher, 1911 Jun 01. 11(10), 528-539.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/992582 Zobrazit plný text záznamu