Seeing Through Arithmetic Series, Grades 3, 4, 5, 6 Maurice L. Hartung Henry Van Engen Lois Knowles
| Autor: | McMahon, Della, Hosier, Max, Hutcheson, Ruth, McBride, Eleanor |
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| Zdroj: | The Arithmetic Teacher, 1960 Jan 01. 7(1), 40-41. |
| Databáze: | JSTOR Journals |
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