Columbia subject headings:
Triple Entente, 1907.
World War, 1914-1918--Causes.
Harvard subject headings:
Europe--Politics and government--1871-1918.
Triple Entente, 1907.
World War, 1914-1918--Causes
Princeton subject headings:
Triple Entente, 1907.
World War, 1914-1918--Causes.