Columbia subject headings:
Harvard subject headings:
Cultural pluralism--Germany--North Rhine-Westphalia--Congresses.
Ethnology--Germany--North Rhine-Westphalia--Congresses.
Nordrhein-Westfalen-Stiftung Naturschutz, Heimat- und Kulturpflege--Congresses.
North Rhine-Westphalia (Germany)--Civilization--20th century--Congresses.
North Rhine-Westphalia (Germany)--Civilization--21st century--Congresses.
North Rhine-Westphalia (Germany)--Social life and customs--20th century--Congresses.
North Rhine-Westphalia (Germany)--Social life and customs--21st century--Congresses.
Princeton subject headings:
Cultural pluralism--Germany--North Rhine-Westphalia--Congresses.
Ethnology--Germany--North Rhine-Westphalia--Congresses.
Nordrhein-Westfalen-Stiftung Naturschutz, Heimat- und Kulturpflege--Congresses.
North Rhine-Westphalia (Germany)--Civilization--20th century--Congresses.
North Rhine-Westphalia (Germany)--Civilization--21st century--Congresses.
North Rhine-Westphalia (Germany)--Social life and customs--20th century--Congresses.
North Rhine-Westphalia (Germany)--Social life and customs--21st century--Congresses.