Columbia subject headings:
Harvard subject headings:
Counterculture--Germany--History--20th century--Congresses.
Counterculture--Germany--History--21st century--Congresses.
Counterculture--History--20th century--Congresses.
Counterculture--History--21st century--Congresses.
Subculture--Germany--History--20th century--Congresses.
Subculture--Germany--History--21st century--Congresses.
Subculture--History--20th century--Congresses.
Subculture--History--21st century--Congresses.
Princeton subject headings:
Counterculture--Germany--History--20th century--Congresses.
Counterculture--Germany--History--21st century--Congresses.
Counterculture--History--20th century--Congresses.
Counterculture--History--21st century--Congresses.
Subculture--Germany--History--20th century--Congresses.
Subculture--Germany--History--21st century--Congresses.
Subculture--History--20th century--Congresses.
Subculture--History--21st century--Congresses.