The Mathematics in Certain Elementary Social Studies in Secondary Schools and Colleges Eugene W. Hellmich

Autor:	Rasor, S. E.
Zdroj:	Educational Research Bulletin, 1939 Mar 01. 18(3), 81-82.
Databáze:	JSTOR Journals
Externí odkaz:	https://www.jstor.org/stable/1474091 Zobrazit plný text záznamu