00582nam a2200169 a 450000500170000000800410001704100080005808200110006610000380007724500720011526400300018730000320021765000190024994200070026899900170027595201200029220260717091352.0260717s1979    ii            000 0 eng d  aeng04a631.521 aSimmonds, N. W. (Norman Willison)10aPrinciples of crop improvement /cSimmonds, N. W. (Norman Willison) 1aLondon :bLongman,c1979.  axiv, 408 p. : ill. ; 22 cm. 4aPlant breeding  cBK  c29676d29676  001040708DCaBKBCLbBKBCLd1990-02-01g116.13l0o631.52 SIMp25287r2026-07-17 09:13:52v116.13w2026-07-17yBK