1)
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2)
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3)
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Methods in Stream Ecology
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von: F. Richard Hauer, Gary A. Lamberti
Elsevier Reference Monographs, 2011
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4)
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5)
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6)
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7)
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8)
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9)
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Biokraftstoffe
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von: Friedrich Fischer, Achim Lack
Vogel Communications Group GmbH & Co. KG, 2007
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10)
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