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List Price	O&A Price
$28.50	$21.95

How Do Airplanes Stay Up?

D. Vilardi

This book introduces readers to the science behind aviation. Your students learn about the four forces of flight: gravity, lift, drag, and thrust. Rich images and easy-to-read text aid comprehension for early readers. Featuring fun facts. Gr. K-3

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Full-color Photographs Further Reading Glossary Index 24 pages 7-1/2" x 8-3/4" ©19