Columbia subject headings:
Harvard subject headings:
Germany--Ethnic relations--Congresses.
Jewish socialists--Germany--Congresses.
Jews--Employment--Germany--Congresses.
Jews--Germany--History--1800-1933--Congresses.
Jews--Germany--Politics and government--Congresses.
Socialism--Germany--Congresses.
Working class--Germany--Congresses.
Princeton subject headings:
Germany--Ethnic relations--Congresses.
Jewish socialists--Germany--Congresses.
Jews--Germany--Politics and government--Congresses.
Socialism--Germany--History--Congresses.