00284nam a2200097Ia 4500008004100000082001900041100003400060245004500094260003900139300000800178140113s9999    xx            000 0 und d  a632.92/93   L9  a"Zadoks, J.C. & Schein, R.D."  aEpidemiology of plant disease management  a1979bOxford Univ. PresscNew York  a427