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  • × author_ss:"Langfeldt, J."
  • × year_i:[1950 TO 1960}
  1. Langfeldt, J.: Zum Problem und zur Geschichte der Systematik : T.1-2. (1957) 0.01 
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    Source
    Bücherei und Bildung. 9(1957), S.465-473, 519-527