Columbia subject headings:
Alternative lifestyles--Europe--Congresses.
Alternative lifestyles--Germany (West)--Congresses.
Europe--Social conditions--20th century--Congresses.
Germany (West)--Social conditions--Congresses.
Harvard subject headings:
Alternative lifestyles--Europe--History--20th century--Congresses.
Alternative lifestyles--Germany (West)--History--Congresses.
Europe--Social conditions--20th century--Congresses.
Germany (West)--Social conditions--Congresses.
Social movements--Europe--History--20th century--Congresses.
Social movements--Germany (West)--History--Congresses.
Socialism--Europe--History--20th century--Congresses.
Socialism--Germany (West)--History--Congresses.
Princeton subject headings:
Alternative lifestyles--Europe--Congresses.
Alternative lifestyles--Germany (West)--Congresses.
Europe--Social conditions--20th century--Congresses.
Germany (West)--Social conditions--Congresses.