00309nam a2200109 a 450000500170000008200210001710000060003811000170004424500760006126000470013730000150018420251203090534.0  a634.956,bD, wie  d_  aWiersum K.F.  aStragies and designs for afforestation, reforestation and tree planting  aNetherlaNew DelhisbPudoc Wageningenc1984  a432p, 23cm