James Trefil

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15 Gründe, warum die Welt nicht auseinanderfällt

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El Panorama Inesperado

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El Panorama Inesperado

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Living in Space

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Meditations At Sunset

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The Dark Side of the Universe: A Scientist Explores …

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Human Nature : A Blueprint for Managing the Earth-b …

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Meditations at 10,000 feet : a scientist in the mou …

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Cassell's Laws of Nature

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Encyclopedia of science and technology