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    <SEQUENTIAL>
      <record key="001" att1="001" value="LIB903750004" att2="LIB903750004">001   LIB903750004</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="">helly, walter</field>
      <field key="331" subkey="">urban systems models</field>
      <field key="403" subkey="">1. ed.</field>
      <field key="410" subkey="">new york, san francisco, london</field>
      <field key="412" subkey="">academic press, a subsidiary of harcourt brace jovanovich, publishers</field>
      <field key="425" subkey="">1975</field>
      <field key="433" subkey="">x, 185 pp.</field>
      <field key="451" subkey="">operations research and industrial engineering</field>
      <field key="451" subkey="h">schmidt, j. william (ed.)</field>
      <field key="517" subkey="c">from the table of contents: preface; introduction; population; economy; land and its development; transportation network;</field>
      <field key="con" subkey="g">estion at bottlenecks; location of public facilities; allocation of public resources; postscript;</field>
      <field key="540" subkey="">0-12-339450-3</field>
      <field key="544" subkey="">7848-A</field>
      <field key="700" subkey="b">301</field>
      <field key="700" subkey="b">sociology and anthropology</field>
      <field key="710" subkey="">cities and towns -- mathematical models</field>
    </SEQUENTIAL>
  </section>