Many walls -- 2000 years of building -- Construction problems -- Activities & tools -- Try this!.
Summary:
"Carefully leveled text and vibrant photographs introduce early readers the science and engineering behind the Great Wall of China. Includes infographics, an activity, glossary, and index."-- 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.