00313nam a2200121Ia 4500008004100000082001300041100002500054245004400079250001100123260002900134300001000163650001800173140113s9999    xx            000 0 und d  a632.9 H7  a" Chester, K. Starr"  aNature and prevention of plant diseases  a2nd Ed  b"H. K. Lewis & Co, 1947"  a525p.  aPlant disease