Columbia subject headings:
Harvard subject headings:
Church work with the working class--Germany--History.
Employees--Germany--Berlin--Societies, etc.--History--19th century.
Employees--Germany--Berlin--Societies, etc.--History--20th century.
Employees--Germany--Brandenburg--Societies, etc.--History--19th century.
Employees--Germany--Brandenburg--Societies, etc.--History--20th century.
Evangelische Arbeitnehmerschaft Berlin-Brandenburg--History.
Germany--Social conditions.
Protestants--Germany--Berlin--Societies, etc.--History--19th century.
Protestants--Germany--Berlin--Societies, etc.--History--20th century.
Protestants--Germany--Brandenburg--Societies, etc.--History--19th century.
Protestants--Germany--Brandenburg--Societies, etc.--History--20th century.
Princeton subject headings:
Germany--Social conditions.
Lutheran labor unions--Germany--History.
Protestants--Germany--History.