Title: Taĭnata diplomat︠s︡ii︠a︡ na t︠s︡ar Ferdinand s Rusii︠a︡
Subjects: International relations, Archival resources, Diplomatic relations, Diplomatic history, Military relations, Foreign countries, Politics and government
Places: Bulgaria, Russia
People: Ferdinand I Czar of Bulgaria (1861-1948), Nicholas II Emperor of Russia (1868-1918)