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Bertha Morris Parker
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Title
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Unknown
Leaves (Basic science education series)
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Life through the ages
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Magnets (Young Scientist Concepts and Projects)
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Plants, Animals and Us
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Reptiles: The Basic Science Education Series
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Science and Us
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Superstition or science
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Tal og fakta om vor verden
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The Basic Science Education Series the Ways of the …
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The Earth's Nearest Neighbor
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