Columbia subject headings:
Christian sociology--Lutheran Church--History.
Labor unions--Religious aspects--Christianity--Germany--History.
Labor--Religious aspects--Christianity--Germany--History.
Harvard subject headings:
Christian sociology--Lutheran Church--History.
Labor unions--Religious aspects--Christianity--Germany--History.
Labor--Religious aspects--Christianity--Germany--History.
Princeton subject headings:
Labor movement--Germany--History--19th century.
Labor movement--Germany--History--20th century.
Labor unions--Religious aspects--Christianity--Germany--History--19th century.
Labor unions--Religious aspects--Christianity--Germany--History--20th century.
Labor--Religious aspects--Christianity--Germany--History--19th century.
Labor--Religious aspects--Christianity--History--20th century.