00337nam a22001097a 4500020001500000082001700015100002400032245008200056260004100138300000800179650004000187  a8172330545  a632.3 ENG/SO  aArthur W  Engelhard  aSoilborne Plant Pathogens:Management Of Diseases With Macro-And Microelements  aJodhpurbScientific Publishersc1993  a217  aintroductionahistorical highlights