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Schiffels, R.: Kategorien der Internationalen Patentklassifikation, insbesondere hinsichtlich der Einordnung von Produkten (1982)
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Internationale Patentklassifikation (1974 ff.)
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Gesell, J.: Neuauflage der Internationalen Patentklassifikation : incompatibility issues of library classification systems and subject headings in subject cataloguing (1986)
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Herbig, E.: ¬Die Internationale Patentklassifikation (1978)
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Internationale Patentklassifikation : Gesamtwerk (2001)
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