Columbia subject headings:
Burundi--Population--History.
Demographic transition.
Forced migration--Burundi.
Migration, Internal--Burundi.
Population density--Burundi.
Population--Economic aspects.
Harvard subject headings:
Burundi--Population--History.
Princeton subject headings:
Burundi--Population density.
Burundi--Population--History.
Demographic transition.
Forced migration--Burundi.
Migration, Internal--Burundi.
Population--Economic aspects.