Steven M. Hoffman

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Weathering and Erosion: Wearing Down Rocks (Rock It!)
Hoffman, Steven M; Hoffman, Stephanie

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� 5.43

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Rock Study: A Guide to Looking at Rocks (Rock It! (Paperback))
Hoffman, Steven M

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� 15.23

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Gems, Crystals, and Precious Rocks (Rock It!)
Hoffman, Steven M; Hoffman, Stephanie

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� 12.55

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Rocks and Soil (Rock It! (Paperback))
Hoffman, Steven M

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� 37.31

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Volcanoes and Earthquakes: Making and Moving Rock (Rock It!)
Hoffman, Steven M; Hoffman, Stephanie

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� 37.31

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Fossils: History in the Rocks (Rock It!)
Hoffman, Steven M; Hoffman, Stephanie

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� 37.31

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