Cambridge University Press Cambridge Factbooks 4 Why Do Swings Swing?
Publikace: A series of twenty non-fiction science readers which engages children in the world around them. Why do swings swing? Why do swings stop swinging? What makes things change direction? You can find the answers to these and other questions about movement - Rees, Peter. Anotace: Zjednodušená četba pro děti ...a dál?