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Alternative Energy |
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American Revolution Reference Library |
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Ancient Civilizations Reference Library |
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Chemical Elements: From Carbon to Krypton |
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Colonial America Reference Library |
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Crusades Reference Library |
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Early Civilizations in the Americas Reference Library |
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Grzimek's Student Animal Life Resource |
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UXL Encyclopedia of Drugs and Addictive Substances |
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UXL Encyclopedia of Science |
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UXL Encyclopedia of World Biography |
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World War II Reference Library |