Brass, Michael. «The Emergence of Mobile Pastoral Elites in the course of the Middle to Late Holocene in the Sahara». Brass, Michael (2007). «Reconsidering the emergence of social complexity in early Saharan pastoral societies, 5000 — 2500 B.C.» Sahara (Segrate, Italy). In up to date occasions, the president is also appeared on as just one…
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