Not just an average unit.
| Autor: | Paull, S. |
|---|---|
| Zdroj: | Arithmetic Teacher. Dec90, Vol. 38 Issue 4, p54. 5p. 4 Color Photographs, 1 Chart. |
| Databáze: | Academic Search Ultimate |
| Externí odkaz: |
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| Autor: | Paull, S. |
|---|---|
| Zdroj: | Arithmetic Teacher. Dec90, Vol. 38 Issue 4, p54. 5p. 4 Color Photographs, 1 Chart. |
| Databáze: | Academic Search Ultimate |
| Externí odkaz: |
|