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  • × year_i:[1930 TO 1940}
  • × type_ss:"m"
  1. Otlet, P.: Traité de documentation : le livre sur le livre - théorie et pratique (1934) 0.02 
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  2. Vogeler, F.; Walther, A.: Theoretisches und Praktisches über die Anlage des Schlagwortkataloges in Volksbüchereien (1931) 0.00 
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