Columbia subject headings:
Harvard subject headings:
Hallein (Austria)--Economic conditions--20th century.
Hallein (Austria)--Economic conditions--21st century.
Hallein (Austria)--History--20th century.
Hallein (Austria)--History--21st century.
Princeton subject headings:
Hallein (Austria)--Economic conditions--20th century.
Hallein (Austria)--Economic conditions--21st century.
Hallein (Austria)--History--20th century.
Hallein (Austria)--History--21st century.