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Paperback
2014 – Incremento de la energía (Growing Energy) (Paperback) Armentrout, David Factory Shop
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eBook
2014 – Inventores y descubrimientos (Inventors and Discoveries) (eBook) Sturm, Jeanne Factory Shop
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Paperback
2014 – La energía a nuestro alrededor (Energy All Around) (Paperback) Silverman, Buffy Factory Shop
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