00373nam a2200133Ia 4500008004100000082001800041100001100059245004100070260006000111300000800171650002300179650001800202653001900220170901s1970    xx            000 0 und d  a581.234bB70S  aBos, L 0aSymptoms of Virus Diseases in Plants  aNew DelhibOxford and IBH Publishing Co. Pvt. Ltdc1970  a206  aBotanical sciences  aPure Sciences  aPlant virology