000 00433nam a2200157Ia 4500
008 130223s9999 xx 000 0 und d
080 _a631.81:633.18
100 _aSmith, J., Umali, G.
245 _aProduction risk and optimal fertilizer rates : An application of the random coef
260 _aManila
260 _c1985
300 _a13 p.
440 _aNo. 115; IRRI Research Paper S
901 _pS38424
942 _cB
_2udc
999 _c130750
_d130750