00731nam a2200193 a 450000100080000000500110000800800410001910000180006024501100007826000360018830000100022450000950023452001210032965000130045065000130046365000090047665000230048565300290050819688412020-02-05       1982    bl uuuu     u0uu1 u    #d1 aWALKER, B. H.  aVegetation dynamics in relation to soil type and herbivores in the semi-arid savannas of Southern Africa.  aPetrolina: EMBRAPA-CPATSAc1982  a19 p.  aTrabalho apresentado no I Simpósio Brasileiro do Trópico Semi-Árido, Olinda, ago. 1982.  aThe structure of semi-árid savannas; Vegetation dynamics in the absence of herbivores; The influence of herbivores.  aSavannas  aCaatinga  aSolo  aVegetação Nativa  aDinâmica da vegetação