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  1. Schneider, J.H.: ¬A classification of information science and library science topics plus an alphabetical index to the classification (1975) 0.04
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  2. ¬A classification of library and information science (1975) 0.03
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  3. Mathematics subject classification (1991) 0.00
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    Footnote
    Abgedruckt in den Sachregisterteilen des 'Zentralblatts für Mathematik' und 'Mathematical Reviews'. - Frühere Ausgaben: 1970; 1980; 1985