00355nam a2200133 a 450000100080000000500110000800800410001910000170006024500470007726000550012430000100017965000180018965300140020715858371992-06-16       1959    bl uuuu      00u1 u    #d1 aIVINS, J. D.  aThe measurement of grassland productivity.  aLondon: Butterworths Scientific Publicationsc1959  a217p.  aProdutividade  aPastagens