000 00279nam a2200121Ia 4500
008 140317s9999 xx 000 0 und d
082 _a631.8
100 _aFAO
245 _aMaximizing fertilizer use efficiency.
260 _aRome
_bFAO
_c1983
300 _a50
942 _2ddc
_cBK
999 _c11499
_d11499