Browsing by Keyword (DDC)

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         004 Data processing and computer science [27]
100 Philosophy [3]
     150 Psychology [73]
300 Social sciences [99]
     320 Political science [20]
     330 Economics [53]
         333 Economics of land and energy [9]
     370 Education [37]
     380 Commerce, communications and transportation [5]
400 Language [3]
     430 German and related languages [1]
500 Science [24]
     510 Mathematics [26]
     530 Physics [52]
     540 Chemistry [45]
     550 Earth sciences and geology [17]
     570 Life sciences; biology [101]
     580 Plants; biology [42]
     590 Animals; zoology [24]
600 Technology [56]