004290000a22001330004500020001500000060000800015082001700023100001400040245014000054260004100194260000900235300000800244650004300252  a3489170008  a100  a634.0498 TEN  aKunze, L.  aXth international symposium on fruit tree virus diseases 1976 heidelberg : papers presented at the poster session at September 4th 1976  aBerlin, Kommission verlag paul parey  c1976  a121  aFruit tree virus diseases - congresses