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  1. Classificación Decimal Universal (CDU) : Edición abreviada de Norma UNE 50001:2000 (2001) 0.15 
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    Editor
    Centro de Información y Documentación Cientifica
    Footnote
    Übers. d. Titels: Universal Decimal Classification: abbridged ed. of norm UNE 50001:2000
    Issue
    Tradución del Master Reference File realizada por le Centro de Información y Documentación Cientifica (CINDOC) ; adaptada por Rosa San Segundo Manuel.
  2. Sistema de Clasificacion Decimal adaptado y traducido bajo la direccion de Jorge Aguayo, con adaptationes para los paises de habla espanola basado en la 18a edicion can adiciones de la 19a edicion (1980) 0.05 
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