Columbia subject headings:
Harvard subject headings:
Europe, Eastern--Historiography.
Europe, Eastern--History--Research--Poland.
Poland--History--1918-1945
Princeton subject headings:
Europe, Eastern--Research--Poland--History--20th century.
Nationalism--Poland--History--20th century.
Poland--Foreign relations--Soviet Union--History--20th century.
Poland--History--1918-1945.
Polish question.
Research--Poland--History--20th century.
Soviet Union--Foreign relations--Poland--History--20th century.