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      <field key="010" subkey="">LIB902827807</field>
      <field key="037" subkey="x">englisch</field>
      <field key="050" subkey="x">Aufsatz, Sammelband</field>
      <field key="090" subkey="">001</field>
      <field key="100" subkey="">childers, erskine h.</field>
      <field key="331" subkey="">operational research and the politician</field>
      <field key="544" subkey="n">6045-A;1</field>
      <field key="596" subkey="a">3 - 9</field>
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