Columbia subject headings:
Drought relief--Namibia--Congresses.
Droughts--Namibia--Congresses.
Harvard subject headings:
Climatic changes--Namibia.
Droughts--Namibia.
Sustainable development--Namibia
Princeton subject headings:
Climatic changes--Environmental aspects--Namibia.
Droughts--Namibia.
Sustainable development--Namibia.