Walshaw, Sarah Catherine Swahili urbanization, trade and food production : botanical perspectives from Pemba Island, Tanzania A.D. 600-1500 - Saint Louis Mission : Department of Anthropology Washington University, 2005 - xi,307p. : ill. ; 28cm. Includes bibliography Subjects--Topical Terms: Africa - Antiquities Zanzibar - civilization LC Class. No.: THS ARC DT15.W35