00362nam a2200121Ia 4500008004100000082001900041100002200060245007000082260002000152300000800172650003900180700002100219140316s9999    xx            000 0 und d  aFAO/FORESTRYb  aHans M, Gregersen  aPlanning and managing forestry research : guidelines for managers  aRomebFAOc1990  a181  aFood and agricultural organisation  aAllen L,Lundgren