Toward Perfect Scores in Arithmetic Fundamentals: A Study in Research

Autor:	Wilson, Guy M.
Zdroj:	The Arithmetic Teacher, 1954 Dec 01. 1(4), 13-17.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/41183738 Zobrazit plný text záznamu