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What Is Gravity? - Trumbauer, Lisa, and Larwa, David (Consultant editor), and Vargus, Nanci R, Ed.D. (Consultant editor)

A simple introduction to gravity, describing what it is and giving some effects of this force.

What Is Gravity? 2004, Children's Press(CT), New York, NY

ISBN-13: 9780516258447

Trade paperback

What Is Gravity? 2004, Perfection Learning

ISBN-13: 9780756943530