Columbia subject headings:
Harvard subject headings:
East European Americans--History--Congresses.
East Europeans--United States--History--Congresses.
Europe, Eastern--Emigration and immigration--History--Congresses.
United States--Emigration and immigration--Government policy--History--Congresses.
United States--Emigration and immigration--History--Congresses.
Princeton subject headings:
East European Americans--History.
East Europeans--United States--History.
Europe, Eastern--Emigration and immigration--History.
United States--Emigration and immigration--Government policy--History.
United States--Emigration and immigration--History.