Columbia subject headings:
Harvard subject headings:
Europe, Central--Emigration and immigration--Economic aspects.
Europe, Eastern--Emigration and immigration--Economic aspects.
Return migration--Europe, Central.
Return migration--Europe, Eastern.
Princeton subject headings:
Europe, Central--Emigration and immigration--Economic aspects.
Europe, Eastern--Emigration and immigration--Economic aspects.
Return migration--Europe, Central.
Return migration--Europe, Eastern.