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john r beaver
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Simple machines
John B. Beaver, Barbara R. Sandall · Mark Twain Media
80 sayfa · 2002
Simple machines / Study and teaching / Machines simples / Étude et enseignement
Simple Machines
John B. Beaver, Barbara R. Sandall, Schyrlet Cameron, Carolyn Craig · Twain Media, Incorporated Publishers, Mark
80 sayfa · 2010
Machinery / Science, study and teaching (elementary) / Simple machines / Study and teaching (Secondary) / Science
Simple Machines, Grades 5 - 8+
John B. Beaver, Barbara R. Sandall · Twain Media, Incorporated Publishers, Mark
80 sayfa · 2002
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