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2008 – ¿Qué es más grande que yo? (What Is Big Compared To Me?) (eBook) Harris, Nancy Factory Shop
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2010 – Measuring: Seconds, Minutes, and Hours (Paperback) Karapetkova, Dr. Holly Factory Shop
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2010 – Measuring: Teaspoons, Tablespoons, and Cups (eBook) Karapetkova, Dr. Holly Factory Shop
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2013 – Cómo medir la materia (The Scoop About Measuring Matter) (eBook) Maurer, Tracy Factory Shop
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