000 00273nam a2200121Ia 4500
008 161121s9999 xx 000 0 und d
100 _aDALTON (GE)
245 0 _aStudy of agriculture systems
260 _cApplied Scientific
365 _b0
650 _aNIL
942 _cBK
999 _c90522
_d90522