Columbia subject headings:
Harvard subject headings:
Germany--Economic conditions--21st century.
Germany--History--Unification, 1990.
Germany--Social conditions--21st century.
Germany--Social policy--20th century.
Princeton subject headings:
Germany--Economic conditions--21st century.
Germany--History--Unification, 1990.
Germany--Social conditions--21st century.
Germany--Social policy--20th century.