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- author's%3a%22Piontek%2c S.%22 2
- authors%3a%22Piontek%2c S.%22 2
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Petersen, C.W.: Grundsätzliches über die Weiterentwicklung der DK (1970)
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- DK-Mitteilungen. 15(1970) Nr.3, S.9-10
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Petersen, C.W.: DK und alphabetischer Thesaurus : Konkurrenten oder Nachbarn? (1973.)
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- Nachrichten für Dokumentation. 24(1973), S.52-59