Columbia subject headings:
Social service--Germany (West)--History.
Social service--Germany--History--19th century.
Social service--Germany--History--20th century.
Harvard subject headings:
Social service--Germany--History--19th century.
Social service--Germany--History--20th century.
Social service--Germany--History.
Princeton subject headings:
Social service--Germany (West)--History.
Social service--Germany--History--19th century.
Social service--Germany--History--20th century.