000 003210000a22001330004500
008 150720t1986 xxu||||| |||| 00| 0 eng d
041 _aeng
080 _a63
_bV3
942 _cBK
100 _aVan Keulen, H.
100 _aWolf, J.
245 _aModelling of agricultural production
260 _aWageningen
_bPudoc
_c1986
999 _c119841
_d119841