00282nam a2200109Ia 450000500170000000800410001708200160005810000160007424500290009026000450011930000080016420260224040821.0260224s9999||||xx |||||||||||||| ||und||  a576.648 VER  aVerma, H.N. 0aBasics of plant virology  aNew Delhi: Oxford & IBH Publishersc2003  a218