000 003430000a22001570004500
020 _a0246117419
060 _a100
082 _a631.5 HAR
100 _aHarper F
245 _aPrinciples of arable crop production
260 _aU S A, Granada
260 _c1983
300 _a336
650 _aCrop production/field crops
942 _cBK
999 _c352490
_d352490