http://dewey.info/scheme/edition/e23/ en
017 General bibliographies and catalogs of works held in specific collections or offered for sale
017.2 Bibliographies and catalogs of private and family libraries
http://dewey.info/scheme/edition/e22/ de
017 Allgemeine Sachkataloge
017.2 Systematische Kataloge von Privat- und Familienbibliotheken
Dewey Decimal Classification
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