000 00488nam a2200181Ia 4500
008 131223s9999 xx 000 0 und d
040 _aISI KOLKATA
041 _aEnglish
082 _a631.8
_bF686
100 _aWilliams M S
110 _aFood and Agriculture Organization
245 _aCrop production levels and fertilizer use
260 _aRome
_bFAO
_c1962
300 _axiv,48p.
650 _aFertilizers and improvement of soil
700 _aCouston J W
_4Auth.
942 _cBK
999 _c93649
_d93649