|aNew York, New York :|bCrabtree Publishing,|c[2014]
300
|a24 pages :|bcolor illustrations ;|c22 cm
490
0
|aEngineering close-up
500
|aIncludes index.
520
|a"Engineers know that there is always more than one possible solution to a problem! This interesting title uses accessible text and relatable examples to explain how engineers test and compare different solutions to determine which solution is best"--|cProvided by publisher
It drives through dirt and mud. It pulls heavy machines through fields. This farm tractor is on the move What jobs do tractors do? And how do farmers drive tractors? Read this book to find out
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