Only one earth the care and maintenance of a small planet: an unofficial report commissioned by the Secretary-General of the United Nations Conference on the Human Environment
| Egile nagusia: | |
|---|---|
| Beste egile batzuk: | , |
| Formatua: | Liburua |
| Hizkuntza: | English |
| Argitaratua: |
New York
Norton
1972
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| Gaiak: |