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  • × year_i:[1980 TO 1990}
  • × author_ss:"Ockenfeld, M."
  1. Ockenfeld, M.: ¬Das Btx-Angebot der GID : Erfahrungen und Perspektiven (1984) 1.00 
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  2. Simon, H.-R.; Ockenfeld, M.: ¬Die Entwicklung von Chemical Abstracts 1907 bis 1980 (1981) 1.00 
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