000 00523nam a2200145Ia 45e0
008 140115n1981 ph |||gr||||Z||||||eng
082 _a631
100 _aZandstra, H. G. and others,
_eAuthor.,
245 0 _aMethodology for On - farm Cropping Systems Research
_cH. G. Zandstra
_hTextual Documents
260 _aManila
_bIRRI
_c1981
300 _a147.
653 _aOn - farm Cropping Systems
653 _aTechniques, equipment & materials
942 _2ddc
_cTXT
999 _c36134
_d36134