Springer is collaborating with JSTOR to digitize, preserve and extend access to GeoJournal. http://www.jstor.org Paleo-Environmental Perspectives on the Sahel Drought of 1968—73 Author(s): K.W. Butzer Source: GeoJournal, Vol. 7, No. 4, Polar Research (1983), pp. 369-374 Published by: Springer Stable URL: http://www.jstor.org/stable/41143145 Accessed: 06-03-2015 21:52 UTC Your use of the JSTOR archive indicates your acceptance of the Terms & Conditions of Use, available at http://www.jstor.org/page/ info/about/policies/terms.jsp JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org. This content downloaded from 128.62.58.77 on Fri, 06 Mar 2015 21:52:29 UTC All use subject to JSTOR Terms and Conditions