Google Scholar September 25, 2025 by jlamprecht http://scholar.google.com/scholar_lookup?&title=Ecosystem%20variability%20and%20early%20human%20habitats%20in%20eastern%20Africa&journal=Proc.%20Natl%20Acad.%20Sci.&volume=110&pages=1167-1174&publication_year=2013&author=Magill%2CCR&author=Ashley%2CGM&author=Freeman%2CKH
