Columbia subject headings:
Developing countries--Emigration and immigration.
Economic development.
Emigration and immigration--Economic aspects.
Migration, Internal--Economic aspects.
Harvard subject headings:
Developing countries--Emigration and immigration.
Economic development
Emigration and immigration--Economic aspects
Migration, Internal--Economic aspects.
Princeton subject headings:
Developing countries--Emigration and immigration.
Economic development.
Emigration and immigration--Economic aspects.
Migration, Internal--Economic aspects.