Portland Public Library
Earth (Planet) -- Age
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http://bibfra.me/vocab/lite/Concept
Label
Earth (Planet) -- Age
Name
Earth (Planet)
Focus
Earth (Planet)
Sub focus
Age
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A (very) short history of life on Earth, 4.6 billion years in 12 pithy chapters, Henry Gee
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Earth (Planet)
Sub focus
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Age
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