Columbia subject headings:
Emigration and immigration law.
Emigration and immigration--Government policy.
Emigration and immigration--Political aspects.
Harvard subject headings:
Emigration and immigration law--Congresses.
Emigration and immigration law.
Emigration and immigration--Government policy
Emigration and immigration--Government policy--International cooperation--Congresses.
Emigration and immigration--Political aspects
Emigration and immigration--Political aspects--International cooperation--Congresses.
Transatlantic Council on Migration--Congresses.
Transnationalism--Congresses.
Princeton subject headings:
Emigration and immigration law.
Emigration and immigration--Government policy.
Emigration and immigration--Political aspects.