00263nam a22001097a 4500003000400000008004100004082001700045100001900062245003500081260002900116300000800145OSt240412b        |||||||| |||| 00| 0 eng d  a631.53bS45P  aSimmonds, N.W.  aPrinciples of crop improvement  aELBSbUBSPD, Patnac1979  a408