00484nam a2200169 a 450000100080000000500110000800800410001910000180006024501220007826000260020030000090022652000340023565000120026965000160028165000080029765000090030512633161993-09-24       1993    bl uuuu     u0uu1 u    #d1 aOLIVRY, J. A.  aThe sick rivers of Africa-or the lasting consequence of the tw o last decade drought in the sudanese-sahelian region.  aFortaleza: ICIDc1993  a10P.  aLow-casamance; Senegal river;  adrought  aHidrografia  aRio  aSeca