00570naa a2200205 a 450000100080000000500110000800800410001910000140006024500920007426000090016665300090017565300150018465300110019965300180021065300110022865300130023965300100025265300120026277300900027410190782004-08-26       2003    bl uuuu     u00u1 u    #d1 aGAVIN, H.  aImpact of ditch management on the water levels of a wet grassland in southeast England.  c2003  aAgua  aHidrologia  aMAnejo  aMeio ambiente  aModelo  aPAstagem  aPasto  aUmidade  tAgriculture Ecosystems & Environment, Amsterdamgv. 99,  n. 1-3, p. 51-60, oct. 2003.