000 00315nam a2200121Ia 4500
008 161118s2016 xx 000 0 und d
082 _a630.72 EWE-O
100 _aEwell, P. T.
245 0 _aOrganization & Management of Fieldactivities in On Farm Research
260 _bISNAR
_c1988
300 _a55p
942 _2ddc
999 _c25114
_d25114