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Gordon, T.J.; Helmer-Hirschberg, O.: Report on a long-range forecasting study (1964)
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- 22. 6.2018 13:24:08
22. 6.2018 13:54:52
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Geh, H.-P.: ¬Die Facettenklassifikation und ihre Anwendung auf das Fach Geschichte (1965)
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