Projects for a healthy planet simple environmental experiments for kids
Projects designed to help us understand causes of pollution, to protect our resources, and to create environmentally friendly products.
| Egile nagusia: | |
|---|---|
| Beste egile batzuk: | , |
| Formatua: | Liburua |
| Hizkuntza: | English |
| Argitaratua: |
New York
Wiley
c1992.
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| Gaiak: |