00305nam a2200121Ia 4500008004100000082001200041100002000053245001900073250001200092260005100104300001000155650001800165140113s9999 xx 000 0 und d a632 L8 a" Singh, R. S." aPlant diseases a4th Ed. b"New Delhi : Oxford & IBH publishing Co, 1978" a564p. aPlant disease