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Amazon.com: The Adventures of Ruby Pi and the Geometry Girls: Teen Heroines in History Use Geometry, Algebra, and Other Mathematics to Solve Colossal Problems (Ruby Pi Adventure): 9781952520273: Durwood, Tom, Uve, Sandra:
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Amazon.com: The Adventures of Ruby Pi and the Geometry Girls: Teen Heroines in History Use Geometry, Algebra, and Other Mathematics to Solve Colossal Problems (Ruby Pi Adventure): 9781952520273: Durwood, Tom, Uve, Sandra:
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