Columbia subject headings:
Political sociology--Congresses.
Schelsky, Helmut--Congresses.
Sociology--Congresses.
Sociology--Germany--Congresses.
Harvard subject headings:
Political sociology--Congresses
Schelsky, Helmut--Congresses.
Sociology--Congresses
Sociology--Germany--Congresses.
Princeton subject headings:
Schelsky, Helmut--Congresses.
Sociology--Congresses.