Quaschning, V. (2005). Understanding renewable energy systems. Earthsean.
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Chicago-čujuhus (17. p.)
Quaschning, Volkar. Understanding Renewable Energy Systems. London: Earthsean, 2005.
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MLA-čujuhus (9. p.)
Quaschning, Volkar. Understanding Renewable Energy Systems. Earthsean, 2005.
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