Columbia subject headings:
Emigration and immigration--Social aspects.
Poland--Emigration and immigration--Social aspects.
Polish people--Foreign countries--Social conditions.
Transnationalism.
Znaniecki, Florian, 1882-1958.
Harvard subject headings:
Emigration and immigration--Social aspects
Poland--Emigration and immigration--Social aspects.
Polish people--Foreign countries--Social conditions.
Transnationalism.
Znaniecki, Florian, 1882-1958.
Princeton subject headings: