Columbia subject headings:
Harvard subject headings:
Poland--Emigration and immigration--Archival resources--Congresses.
Poland--Emigration and immigration--Congresses.
Poland--Intellectual life--1945-1989
Polish people--Foreign countries--Archival resources--Congresses.
Polish people--Foreign countries--Intellectual life--20th century--Congresses.
Polish people--Services for--Foreign countries--Congresses.
Princeton subject headings:
Poland--Emigration and immigration--Archival resources.
Poland--Emigration and immigration.
Polish people--Foreign countries--Archival resources.
Polish people--Foreign countries.