00426nam a2200157Ia 4500001001000000003000500010008004100015010001100056040000900067100001800076245007500094260003900169300001100208650002700219700002200246Para_6528CHAP220125s1974    xx            000 0 und d  a205386  cCHAP  aHampton, R.O.  aBean necrosis disease /c prepared by R.O. Hampton and Paul A. Kopsell  aOregon :b Oregon State University  a1 hoja  aFrijol x enfermedades  aKoepsell, Paul A.