Tuross, Noreen C. and Fogel, Marilyn L. 1994. "Stable Isotopic Analysis and Subsistence Patterns at the Sully Site, SD." In The Skeletal Biology of the Plains. Owsley ...
Among Middle Eastern pastoral nomads some "tribes" can best be described as "units of subsistence": they exploit an area providing multiannual subsistence. Tribesmen sometimes control this area; more ...
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