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Engbarth, M.: ¬Die Library of Congress Classification : Geschichte, Struktur, Verbreitung und Auswirkungen auf deutsche Bibliotheksklassifikationen (1980)
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Wimmer, F.: ¬Die internationale Dezimalklassifikation : Betrachtungen zu ihrer Entstehungsgeschichte und Aktualität (1985)
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Martel, C.: Classification: a brief conspectus of present day library practice (1985)
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Dewey, M.: Decimal classification and relativ index : introduction (1985)
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Hopwood, H.V.: Dewey expanded (1985)
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