"Whirr! A concrete mixer's drum spins round and round! Learn more about why these big machines never stop moving. Additional features to aid comprehension include a table of contents, informative sidebars and captions, an activity, critical-thinking questions, sources for further research, a phonetic glossary, an index, and an introduction to the author"-- Provided by publisher.
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.