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Máquinas simples (Simple Machines)
6 books in this series
El aprovechado plano inclinado (The incredible inclined plane)
By Murray, Julie
Abdo Kids Junior
El sencillo tornillo (The spiffy screw)
By Murray, Julie
Abdo Kids Junior
El tosco torno (The wonderful wheel and axle)
By Murray, Julie
Abdo Kids Junior
La curiosa cuña (The wacky wedge)
By Murray, Julie
Abdo Kids Junior
La franca palanca (The lovable lever)
By Murray, Julie
Abdo Kids Junior
La potente polea (The powerful pulley)
By Murray, Julie
Abdo Kids Junior
