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Wet phases in the Sahara/Sahel region and human migration patterns in North Africa.
Castañeda IS, Mulitza S, Schefuss E, Lopes dos Santos RA, Sinninghe Damsté JS, Schouten S. Castañeda IS, et al. Among authors: lopes dos santos ra. Proc Natl Acad Sci U S A. 2009 Dec 1;106(48):20159-63. doi: 10.1073/pnas.0905771106. Epub 2009 Nov 12. Proc Natl Acad Sci U S A. 2009. PMID: 19910531 Free PMC article.