Why Do Bridges Arch? Level 3. Factbook. Rachel Griffiths
261 руб
What holds up skyscrapers? Why are sports domes curved? Why are triangles used in many bridges? You can find the answers to these and other questions about structures in Why Do Bridges Arch?
Из серии: Cambridge Young Readers
2010. A series of twenty non-fiction science readers which engages children in the world around them.