Columbia subject headings:
Harvard subject headings:
Conservatism--Germany--Congresses.
Conservatism--Netherlands--Congresses.
Populism--Germany--Congresses.
Populism--Netherlands--Congresses.
Right-wing extremists--Germany--Congresses.
Right-wing extremists--Netherlands--Congresses.
Princeton subject headings:
Germany--Politics and government--1990-
Netherlands--Politics and government--21st century.
Political parties--Germany.
Political parties--Netherlands.
Populism--Germany.
Populism--Netherlands.
Right-wing extremists--Germany.
Right-wing extremists--Netherlands.