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523 Einzelne Himmelskörper und Himmelsphänomene
523.01 Astrophysik
523.013 Wärme 523.015 Licht, Infrarot- und Ultraviolettstrahlung 523.018 Elektrizität und Magnetismus 523.019 Molekular-, Atom-, Kernphysik
Dewey Decimal Classification
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