00326nam a2200097Ia 4500008004100000082001900041100003300060245008700093260004000180300000800220140113s9999    xx            000 0 und d  a581.2:632   K8  aNational Academy of Sciences  aPlant Disease development and control(Principles of Plant & animal Control. Vol.1)  bNational Academy of SciencecU.S.A.  a205