Columbia subject headings:
Poland--Foreign relations--1918-1945--Sources.
Russo-Polish War, 1919-1920--Diplomatic history--Sources.
Soviet Union--Foreign relations--1917-1945--Sources.
Harvard subject headings:
Poland--Foreign relations--1918-1945--Sources.
Russo-Polish War, 1919-1920--Diplomatic history--Sources.
Soviet Union--Foreign relations--1917-1945--Sources.
Princeton subject headings:
Poland--Foreign relations--1918-1945--Sources.
Russo-Polish War, 1919-1920--Diplomatic history--Sources.
Soviet Union--Foreign relations--1917-1945--Sources.