State of the world 1987 a Worldwatch Institute report on progress toward a sustainable society
| Erakunde egilea: | |
|---|---|
| Beste egile batzuk: | |
| Formatua: | Liburua |
| Hizkuntza: | English |
| Argitaratua: |
New York
W. W. Norton and Company
c1987
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| Saila: | Worldwatch environmental alert series.
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| Gaiak: |