Columbia subject headings:
Harvard subject headings:
Diplomatic and consular service, Soviet.
Soviet Union--Foreign relations--1917-1945.
Soviet Union. Obʺedinennoe gosudarstvennoe politicheskoe upravlenie.
Princeton subject headings:
Diplomatic and consular service, Russian.
Russia--Foreign relations--1917-1945.
Soviet Union. Obʺedinennoe gosudarstvennoe politicheskoe upravlenie