72 GEOGRAPHY | MT 7221 Africa | BT1 sub-Saharan Africa | RT arid zone [5211] | desert [5211] | desertification [5216] | drought [5216]
72 GÉOGRAPHIE | MT 7221 Afrique | BT1 Afrique subsaharienne | RT désert [5211] | désertification [5216] | sécheresse [5216] | zone aride [5211]