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3
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New and renewable energies : some practical examples : micro-hydropower, solar cells, cooking stoves, solar water heaters, biogaz / by Ueli Meier and Urs Rentsch.
- Enda [etc.],
- 1981.
- Dakar :
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Ãnergies nouvelles et renouvelables / par Ueli Meier et Urs Rentsch.
- Enda [etc.],
- 1983.
- Dakar :
-
New and renewable energies : some practical examples : proceedings... / by Ueli Meier and Urs Rentsch.
- Enda,
- [ca. 1981].
- Dakar :