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Professor Astro Cat's Deep Sea Voyage
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Ray - How Light Works (A Science Pals Book)
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Read, Learn & Create--The Ocean Craft Book
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River of Dreams - The Story of the Hudson River
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River Story
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River's Journey (Nature in Action)
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Riverkeeper - Protecting an American River (Books for a Better Earth)
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Rocks and Minerals (National Geographic Kids Readers, Level 2) (National Geographic Kids Readers)
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Sabertooths and the Ice Age - A Nonfiction Companion to Magic Tree House #7: Sunset of the Sabertooth (Magic Tree House Fact Tracker) (Book:12)
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Salt - A World History
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Sold outScales/Silenic Drift
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Scenic Science of the National Parks - An Explorer's Guide to Wildlife, Geology, and Botany
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Scratch-Off Hidden Pictures Mysterious Ocean Puzzles (Highlights Scratch-Off Activity Books)
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Secretos del Planeta Tierra (Explanatorium of the Earth)
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Selected Writings of John Muir - Introduction by Terry Tempest Williams (Everyman's Library Classics Series)
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Serengeti - Plains of Grass
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