TY - BOOK AU - Verma H.N. AU - Verma H.N. TI - Basics of Plant Virology SN - 81-204-1605-8 U1 - 632.8 PY - 2003/// CY - New Delhi PB - Oxford and IBH Publishing KW - chlorosis, necrosis, ringspotting, nuclei N1 - chlorosis necrosis ringspotting nuclei N2 - the viruses and , their diseases and the development of methods for theirrrcontrol continue to be vital elements in improving crop productivity ER -