Columbia subject headings:
Citizenship--Germany.
Germany--History--Unification, 1990.
Harvard subject headings:
Germany--History--Unification, 1990--Longitudinal studies.
Germany--Social conditions--Longitudinal studies.
Social change--Germany (East)--History--21st century--Longitudinal studies.
Social change--Germany--History--Longitudinal studies.
Social change--Germany--Saxony--Longitudinal studies.
Princeton subject headings: