000 00427cam a22001451 4500
082 _a631.8
_bIGN
_cL-32, P-52
100 1 _aIgnatieff, Vladimir,
245 0 0 _aEfficient use of fertilizers.
260 _aWashington,
_bFood and Agriculture Organization of the United Nations,
_c1949.
300 _ax, 182 p.
_billus., maps.
_c23 cm.
490 1 _aFAO agricultural studies,
650 0 _aFertilizers.
650 0 _aMCE
942 _cBK
999 _c8671
_d8671