"The Early Iron Age on Mafia Island and its relationship with the mainland | Maxon, East Africa: An Introductory History, 2 Revised edition, West Virginia University: 1994 , p |
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Robert Stock, Africa South of the Sahara, Second Edition: A Geographical Interpretation, The Guilford Press; 2004 , p | In: The Spice Trade of the Roman Empire |
The IUCN Red List of Threatened Species :• Michael Hodd, East Africa Handbook, 7th Edition, Passport Books: 2002 , p.
20Sandra Fullerton Joireman, Institutional Change in the Horn of Africa, Universal-Publishers: 1997 , p | ; Wallis, James R 1999 |
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"The eastern part of the African continent, especially the countries of Kenya, Uganda, and Tanzania | Fage, A history of Africa, Routledge, 2002, p |
Robert Jurmain; Lynn Kilgore; Wenda Trevathan 2008.