(2002). Droughts, food and culture: Ecological change and food security in Africa's later prehistory. Kluwer Plenum.
Chicago-viite (17. p.)Droughts, Food and Culture: Ecological Change and Food Security in Africa's Later Prehistory. New York: Kluwer Plenum, 2002.
MLA-viite (9. p.)Droughts, Food and Culture: Ecological Change and Food Security in Africa's Later Prehistory. Kluwer Plenum, 2002.
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