000 00299nam a2200121Ia 4500
008 140113s9999 xx 000 0 und d
082 _a31:631.8:633.18 K6.1
100 _aFAO
245 _aStatistics of crop responses to fertilizers.
260 _a1966
_bFAO
_cRome
300 _a112
942 _cBK
999 _c58289
_d58289