000 00538nam a2200181Ia 4500
008 170901s1981 xx 000 0 und d
082 _a631.072
_bZ-2M
100 _aZandstra, H. G.
245 0 _aMethodology for on-farm Cropping Systems Research
260 _aManila
_bThe International Rice Research Institute
_c1981
300 _a147
650 _aAgriculture and related technologies
650 _aTechnology (Applied sciences)
653 _aAgronomy
653 _aResearch methods
700 _aPrice, E. C.
942 _2ddc
_cBK
999 _c12868
_d12868