000			00390 a2200181 4500
260			_aLondres
100			_aSIMMONDS, Norman Willison
260			_bLongman
245			_aPrinciples of crop improvement
300			_axiv-408p.
650			_aAMELIORATION DES PLANTES
260			_c1979
300			_bill.
130			_lEn
020			_a0 582 44630 9
999			_c22328 _d22328