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  • × type_ss:"m"
  • × year_i:[1930 TO 1940}
  1. Vogeler, F.; Walther, A.: Theoretisches und Praktisches über die Anlage des Schlagwortkataloges in Volksbüchereien (1931) 0.04
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  2. Otlet, P.: Traité de documentation : le livre sur le livre - théorie et pratique (1934) 0.02
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