Columbia subject headings:
Harvard subject headings:
Poland--Emigration and immigration
Poland--Emigration and immigration--History--Sources.
Poland--History, Military--Sources.
Polish people--Foreign countries--History--Sources.
Polish people--Foreign countries--Social conditions.
Princeton subject headings:
Poland--Armed Forces--History--Sources.
Poland--Emigration and immigration--Social aspects--History--Sources.
Poland--History, Military--Sources.
Polish people--Foreign countries--History--Sources.
Polish people--Foreign countries--Social conditions.
Polish people--Great Britain--History--Sources.