Gerald H. Krockover

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Creative Sciencing V11
Devito, Alfred; Gerald H. Krockover; Krockover, Gerald H

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� 3.79

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New Activities Handbook for Energy Education
Devito, Alfred; Krockover, Gerald H.

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� 6.45

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Creative Sciencing: A Practical Approach
Devito, Alfred; Krockover, Gerald

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� 19.27

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