Columbia subject headings:
Emotions--Sociological aspects.
Social movements--Germany.
Socialism--Germany--History--19th century.
Socialism--Germany--History--20th century.
Working class--Germany--History--19th century.
Working class--Germany--History--20th century.
Working class--Germany--Social conditions--19th century.
Working class--Germany--Social conditions--20th century.
Harvard subject headings:
Emotions--Sociological aspects
Social movements--Germany.
Socialism--Germany--History--19th century
Socialism--Germany--History--20th century
Working class--Germany--History--19th century
Working class--Germany--History--20th century
Working class--Germany--Social conditions--19th century.
Working class--Germany--Social conditions--20th century.
Princeton subject headings:
Emotions--Sociological aspects.
Social movements--Germany.
Socialism--Germany--History--19th century.
Socialism--Germany--History--20th century.
Working class--Germany--History--19th century.
Working class--Germany--History--20th century.
Working class--Germany--Social conditions--19th century.
Working class--Germany--Social conditions--20th century.