Columbia subject headings:
Europe--Defenses.
Soviet Union. Raboche-Krestʹi︠a︡nskai︠a︡ Krasnai︠a︡ Armii︠a︡--Armored troops.
Tank warfare.
Harvard subject headings:
Europe--Defenses.
Soviet Union. Sovetskai︠a︡ Armii︠a︡--Armored troops.
Tank warfare.
Princeton subject headings:
Europe--Defenses.
Soviet Union. Sovetskai︠a︡ Armii︠a︡--Armored troops.
Tank warfare.