00270nam a22001097a 4500003000400000005001700004008004100021082001400062100002000076245004000096260002400136OSt20230529163107.0230529b        |||||||| |||| 00| 0 eng d  a633bM39P  aMartin, John H.  aPrinciples of Field Crop Production  bMacmillan Co.c1967