00254nam a22001097a 4500003000400000008004100004082001700045100001800062245003900080260001700119300000800136OSt240123b        |||||||| |||| 00| 0 eng d  a634.11bP69V  aPosnelle,A.F.  aUirus diseases of apples and pears  aC.A.B.c1963  a141