Columbia subject headings:
Balkan Peninsula--History--War of 1912-1913.
Bobchev, Stefan S. (Stefan Savov), 1853-1940.
Bulgaria--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Bulgaria.
Harvard subject headings:
Balkan Peninsula--History--War of 1912-1913.
Bobchev, Stefan S. (Stefan Savov), 1853-1940
Bulgaria--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Bulgaria.
Princeton subject headings:
Balkan Peninsula--History--War of 1912-1913.
Bobchev, Stefan S. (Stefan Savov), 1853-1940.
Bulgaria--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Bulgaria.