Columbia subject headings:
Catholic Church--France--History--20th century.
France--History--1914-1940.
World War, 1914-1918--France--Catholic Church.
Harvard subject headings:
Catholic Church--France--History--20th century.
France--History--1914-1940.
World War, 1914-1918--Religious aspects--Catholic Church
Princeton subject headings:
Catholic Church--France--History--20th century.
Catholics--France.
France--Church history--20th century.
World War, 1914-1918--Catholic Church--France.