00274nam a22001097a 4500003000400000008004100004082001500045100001800060245005500078260002300133300000800156OSt240715b        |||||||| |||| 00| 0 eng d  aR632bA91D  aAustin, R. B.  aDecision making in the practice of crop production  aLondonbBCPCc1982  a238