Columbia subject headings:
Poland--Foreign relations--Soviet Union.
Poland--History--German occupation, 1914-1918.
Polish question.
Soviet Union--Foreign relations--Poland.
Soviet Union--History--Revolution, 1917-1921.
Treaty of Brest-Litovsk
Harvard subject headings:
Poland--Foreign relations--Soviet Union
Poland--History--German occupation, 1914-1918
Polish question.
Soviet Union--Foreign relations--Poland.
Soviet Union--History--Revolution, 1917-1921.
Treaty of Brest-Litovsk
Princeton subject headings:
Poland--Politics and government--1796-1918.
Soviet Union--History--Revolution, 1917-1921--Influence.