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1
by Pernick, Ron
Published 2007
HarperCollins e-books
Subjects: “...Renewable energy sources / http://id.loc.gov/authorities/subjects/sh85112837...”
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2
by Siegel, Jeffrey
Published 2008
John Wiley & Sons
Subjects: “...Renewable energy sources / http://id.loc.gov/authorities/subjects/sh85112837...”