Columbia subject headings:
Harvard subject headings:
Rhineland (Germany)--History--20th century.
Rhineland (Germany)--Pictorial works.
World War, 1914-1918--Germany--Rhineland.
Princeton subject headings:
Rhineland (Germany)--History--20th century.
Rhineland (Germany)--Pictorial works.
World War, 1914-1918--Germany--Rhineland.