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