"Ninety Percent of the Game Is Half Mental"

Autor:	Garrison, Leslie, Ponce, Gregorio A., Amaral, Olga M.
Zdroj:	Teaching Children Mathematics, 2007 Aug 01. 14(1), 12-17.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/41199044 Zobrazit plný text záznamu