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Renewable Energy
heftet,
1992,
Engelsk,
ISBN 9781559631389
Covers hydropower, wind energy, solar-thermal electricity, ocean energy systems, geothermal energy, gasification biomass power, fuel alcohol, and solar hydrogen
Children of the Stones
heftet,
2015,
ISBN 9781781961353
Return to the Stones
heftet,
2015,
ISBN 9781781961360