Columbia subject headings:
Hungary--Emigration and immigration--History--20th century.
Hungary--History--1945-1989.
Slovakia--Emigration and immigration--History--20th century.
Slovaks--Hungary--History--20th century.
Harvard subject headings:
Hungary--Emigration and immigration--History--20th century.
Hungary--History--1945-1989
Population transfers--Slovaks.
Slovakia--Emigration and immigration--History--20th century.
Slovaks--Hungary--History--20th century.
Princeton subject headings: