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  1. Einführung in die Handhabung der Internationalen Patentklassifikation (1977) 8.65 
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  2. Taube, U.-F.: ¬Die Internationale Patentklassifikation (IPC) und ihre Anwendung in der Bibliothek des Deutschen Patentamtes (1979) 8.65 
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  3. Schramm, R.: Patentinformation (1997) 8.65 
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  4. Herbig, E.: ¬Die Internationale Patentklassifikation (1978) 8.65 
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  5. Schiffels, R.: Kategorien der Internationalen Patentklassifikation, insbesondere hinsichtlich der Einordnung von Produkten (1982) 8.65 
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  6. Internationale Patentklassifikation (1974 ff.) 8.65 
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  7. Gesell, J.: Neuauflage der Internationalen Patentklassifikation : incompatibility issues of library classification systems and subject headings in subject cataloguing (1986) 8.65 
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