01172nam0-22003371i-450-99000206038040332120050728133430.084-7719-628-1000206038FED01000206038(Aleph)000206038FED0100020603820030910d1998----km-y0itay50------baengESAphids in natural and managed ecosystemsprocedings of the fifth International Symposium on Aphids, September 15th-19th, 1997edited by Juan M. Nieto Nafría & Anthony F.G. Dixonscientific committee, Anthony F. G. Dixon ... [et al.]LeónUniversidad de León1998688 p.24 cmEcosistemaAfidiCongressi595.7522Dixon,Anthony Frederick GeorgeNieto Nafria,Juan M.International Symposium on Aphids<5. ;1997 ;León>423135ITUNINARICAUNIMARCBK99000206038040332161 IV F.6/867501 (12/4/99)DAGENDAGENAphids in natural and managed ecosystems393170UNINA