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_aEdgar, Robert. _935336 |
| 245 | 1 | 2 | _aA greenhouse that stores and recovers energy |
| 500 | _aSobretiro de : Spirit of enterpreses : The 1981 Rolex Awards. -- London : Harrap, 1981 pp. 36-39 | ||
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_aEnergía solar en agricultura. _936913 |
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_aInvernaderos. _960172 |
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