00296nam a2200109Ia 4500008004100000082001500041245004800056250001200104260003600116300000900152650002500161140113s9999    xx            000 0 und d  a631.147 M9  aOrganic farming for Sustainable Agriculture  a2nd ed.  b"Bikaner : Agro Botanica, 1999"  a294p  aAgricultural ecology