Columbia subject headings:
Diplomatic and consular service, Russian--History--Sources.
Russia--Foreign relations.
Harvard subject headings:
Diplomatic and consular service, Russian--History--Sources.
Russia--Foreign relations--To 1689.
Russia--Foreign relations.
Russia. Posolʹskīĭ prikaz--History.
Princeton subject headings:
Diplomatic and consular service, Russian--History--Sources.
Russia--Foreign relations--History.