00524 2200193 4500001002100000005001500021035002000036007000300056008004100059020001800100082001100118084001700129100002000146245005300166260004300219300003800262600001700300990001300317INLIS00000000000004020220518023640 a0010-0522000029ta220518 g 0 eng  a0-582-44630-9 a631.17 a631.17 SIM p0 aSimmonds, N. W.1 aPrinciples Of Crop Improvement /cN. W. Simmonds aLondon :bLongman Group Limited,c1979 axiv, 408 hlm. :bilus ;c21,5 cm. 4aAgricultural aBUN00049