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    <SEQUENTIAL>
      <record key="001" att1="001" value="LIB905862508" att2="LIB905862508">001   LIB905862508</record>
      <field key="037" subkey="x">englisch</field>
      <field key="050" subkey="x">Buch</field>
      <field key="076" subkey="">Sozialwissenschaft</field>
      <field key="100" subkey="">kahn, david</field>
      <field key="331" subkey="">the codebreakers</field>
      <field key="335" subkey="">the story of secret writing</field>
      <field key="403" subkey="">1. ed.</field>
      <field key="410" subkey="">new york</field>
      <field key="412" subkey="">macmillan</field>
      <field key="425" subkey="">1967</field>
      <field key="433" subkey="">xvi, 1164 pp.</field>
      <field key="544" subkey="">11140-A</field>
    </SEQUENTIAL>
  </section>