Columbia subject headings:
Church work with youth--Germany--History--19th century.
Rhineland (Germany)--Church history--19th century.
Westphalia (Germany)--Church history--19th century.
Young Men's Christian Association. Germany. Christliche Vereine Junger Männer--History--19th century.
Harvard subject headings:
Church work with youth--Germany (West)--Rhineland--History--19th century
Rheinisch-Westphälischer Jünglingsbund--History--19th century.
Rhineland (Germany)--Church history--19th century.
Princeton subject headings: