00965naa a2200253 a 450000100080000000500110000800800410001910000170006024501260007726000090020330000160021252001730022865000090040165000210041065000160043165000110044765000250045865300140048365300190049770000140051670000180053070000190054877301440056711597832017-03-29       1992    bl ---       0--  u    #d1 aMAINGUET, M.  aModifications of the Sahelian and Sudanian ecosystems in Western Malibstudy of desertification with remote sensing data.  c1992  ap. 165-177.  aStudy methods; Climatic fluctuations; Soil degradation: the influence of aeolian and surface water erosion; Changes in land occupation; Changes in cultivated land area.  aMali  aDesertificação  aEcossistema  aManejo  aSensoriamento Remoto  aEcosystem  aTerras áridas1 aGUYOT, L.1 aCHEMIN, M. C.1 aBRAUNSTEIN, A.  tIn: DREGNE, H. E. (Ed.). Degradation and restoration of arid lands. Texas: International Center for Arid and Semi-Arid Lands Studies, 1992.