00353nam a2200133Ia 4500008004100000020001500041082001900056100000500075245004600080260003300126300000800159650003000167700002200197140316s9999    xx            000 0 und d  a0442004818  a333.73bGAN/NA  a  aNatural resource management of water land  aLondonbChapman & Hallc1990  a192  aRural resource management  aGangstad,Edwars O