00512naa a2200157 a 450000100080000000500110000800800410001910000140006024500970007426000090017165300140018065300080019465300110020270000220021377301190023510979142000-03-28       1970    bl ---       0--  u    #d1 aNEL, A.C.  aGrapevine virus diseases in South Africa and the influence of latent viruses in the nursery.  c1970  aINDEXAGEM  aUVA  aVIROSE1 aENGELBRECHT, D.J.  tREUNION DU GROUPE INTERNATIONAL D'ETUDES DES VIRUS ET DES MALADIES A VIRUS DE LA VIGNE, 4, 1970, Colmar., p.67-74.