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      <record key="001" att1="001" value="LIB904190109" att2="LIB904190109">001   LIB904190109</record>
      <field key="010" subkey="">LIB904183804</field>
      <field key="037" subkey="x">englisch</field>
      <field key="050" subkey="x">Aufsatz, Sammelband</field>
      <field key="090" subkey="">063</field>
      <field key="100" subkey="">saboia, joão luiz maurity</field>
      <field key="104" subkey="a">almeida, josé edilson</field>
      <field key="331" subkey="">two linear programming models for optimal production of animal protein</field>
      <field key="544" subkey="n">8548-B;63</field>
      <field key="596" subkey="a">449 - 454</field>
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