Columbia subject headings:
Mysticism--History--20th century--Congresses.
War--Moral and ethical aspects--Congresses.
War--Religious aspects--Christianity--Congresses.
World War, 1914-1918--Moral and ethical aspects--Congresses.
World War, 1914-1918--Religious aspects--Christianity--Congresses.
World War, 1939-1945--Moral and ethical aspects--Congresses.
World War, 1939-1945--Religious aspects--Christianity--Congresses.
Harvard subject headings:
Mysticism--History--20th century--Congresses.
War--Moral and ethical aspects--Congresses.
War--Religious aspects--Christianity--Congresses.
World War, 1914-1918--Moral and ethical aspects--Congresses.
World War, 1914-1918--Religious aspects--Christianity--Congresses.
World War, 1939-1945--Moral and ethical aspects--Congresses.
World War, 1939-1945--Religious aspects--Christianity--Congresses.
Princeton subject headings: