00311nam a2200097Ia 4500008004100000082002400041100002100065245006700086260005300153300000700206140113s9999    xx            000 0 und d  a632.38:633.359   L4  a"Hagedorn, D.J."  a" Virus diseases of pea, pisum satiuum(A.P.S. Monograph no.9)"  a1974bAmerican Phytopathological Soc.cMinesotta  a47