Columbia subject headings:
Ambassadors--Soviet Union--Biography.
Dubinin, I͡Uriĭ Vladimirovich.
Soviet Union--Foreign relations--Spain.
Spain--Foreign relations--Soviet Union.
Harvard subject headings:
Ambassadors--Soviet Union--Biography
Diplomatic and consular service, Soviet--History.
Dubinin, I︠U︡. V. (I︠U︡riĭ Vladimirovich)
Soviet Union--Foreign relations--Spain.
Spain--Foreign relations--Soviet Union.
Princeton subject headings: