https://books.google.co.uk/books?id=py0-A3ClS1EC&printsec=copyright&redir_esc=y
The Kingdom of Waalo: Senegal Before the Conquest - Boubacar Barry - Google Books
Situated along the Senegal River, the Kingdom of Waalo was the smallest of the Wolof states of Senegal, but it illustrates the broader consequences of a shift...
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