00351nam a2200133Ia 4500001000500000005001700005008004100022020001500063082001400078100002400092245007100116260000800187650002200195191620261006003558.0120911s9999    xx            000 0 und d  a0442004818  a333.7 GAN  aGangstad, Edward O.  aNatural resource management of water and land / Edward O. Gangstad  aVNR  aNatural resources