Columbia subject headings:
Germany--Economic conditions--1990---Mathematical models.
Germany--Politics and government--1990---Mathematical models.
Germany--Social conditions--1990---Mathematical models.
Social sciences--Research--Germany.
Harvard subject headings:
Germany--Economic conditions--1990---Mathematical models.
Germany--Politics and government--1990---Mathematical models.
Germany--Social conditions--1990---Mathematical models.
Social sciences--Research--Germany.
Princeton subject headings:
Germany--Economic conditions--1990---Mathematical models.
Germany--Politics and government--1990---Mathematical models.
Germany--Social conditions--1990---Mathematical models.
Social sciences--Research--Germany.