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      <record key="001" att1="001" value="IHS100389703" att2="IHS100389703">001   IHS100389703</record>
      <field key="037" subkey="x">englisch</field>
      <field key="050" subkey="x">Buch</field>
      <field key="076" subkey="">Ökonomie</field>
      <field key="100" subkey="">theil, h.</field>
      <field key="331" subkey="">linear aggregation of economic relations</field>
      <field key="403" subkey="">1. ed.</field>
      <field key="410" subkey="">amsterdam</field>
      <field key="412" subkey="">north-holland publishing company</field>
      <field key="425" subkey="">1954</field>
      <field key="433" subkey="">xi, 205 pp.</field>
      <field key="451" subkey="">contributions to economic analysis; vii</field>
      <field key="451" subkey="h">tinbergen, j. (ed.) ; verdoorn, p.j. (ed.) ; witteveen, h.j. (ed.)</field>
      <field key="517" subkey="c">from the table of contents: introduction; aggregation over one set of individuals; aggregation over several sets of individuals</field>
      <field key="or" subkey="c">ommodities; aggregation over time periods; systems of simultaneous macroequations; further extensions; perfect aggregation;</field>
      <field key="con" subkey="c">lusion; mathematical clarifications;</field>
      <field key="544" subkey="">1502-A</field>
    </SEQUENTIAL>
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