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      <field key="010" subkey="">LIB904519703</field>
      <field key="037" subkey="x">englisch</field>
      <field key="050" subkey="x">Aufsatz, Sammelband</field>
      <field key="090" subkey="">076</field>
      <field key="100" subkey="">keeves, j.p.</field>
      <field key="331" subkey="">longitudinal research methods</field>
      <field key="544" subkey="n">X166-A;76</field>
      <field key="596" subkey="a">369 - 382</field>
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