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080 _a631.1
245 0 _aFarm management investigations for agricultural improvement /
_cPreparated by W. Y. Yang.
260 _aRome :
_bFood and Agriculture Organization of the United Nations,
_c1952
300 _av, 36 p. --
336 _2isbdcontent
_aTexto (visual)
337 _2isbdmedia
_3Impreso
_asin mediaciĆ³n
490 _aFAO Development paper
490 _v20
650 _aAgricultura
942 _2cdu
942 _cBK
999 _c6208
_d6208