More by Kerri O'Donnell
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The Gold Rush: A Primary Source History of the Search for Gold in California (Primary Sources in American History)
The California Gold Rush: Multiplying and Dividing Using Three- And Four-Digit Numbers (Powermath)
The Ancient Civilizations of Greece And Rome: Solving Algebraic Equations (Powermath)
Natural Wonders of the World: Converting Measurements to Metric Units (Powermath)
Ugly Bugs