00307nam a2200109Ia 4500008004100000040003800041100001400079245004700093260002500140300001600165653001600181211214s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aMartin, H 0aScientific principles of plant protection.  bEDWARDaLONDONc1948  aX, 356 p p.  aAGRICULTURE