Columbia subject headings:
Livestock--Economic aspects--Africa, Sub-Saharan.
Nomads--Africa, Sub-Saharan.
Harvard subject headings:
Livestock--Economic aspects--Africa, Sub-Saharan.
Nomads--Africa, Sub-Saharan.
Princeton subject headings:
Livestock--Economic aspects--Africa, Sub-Saharan.
Nomads--Africa, Sub-Saharan.