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      <record key="001" att1="001" value="LIB902359307" att2="LIB902359307">001   LIB902359307</record>
      <field key="010" subkey="">LIB902355703</field>
      <field key="037" subkey="x">englisch</field>
      <field key="050" subkey="x">Aufsatz, Sammelband</field>
      <field key="090" subkey="">036</field>
      <field key="100" subkey="">abadie, j.</field>
      <field key="331" subkey="">introduction - mathematical methods of optimization</field>
      <field key="544" subkey="n">5152-A(1969);36</field>
      <field key="596" subkey="a">435 - 436</field>
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