000 00626nam a22002297a 4500
015 _a6699
020 _a92-5-103448-6
041 _a1
080 _a630
_bDAV
100 _aNorman, D.
100 _aDouglas, M.
110 _aFood and Agriculture Organization of the United Nations
_cRome
245 _aFarming Systems Developments and Soil Conservation
260 _aFood and Agriculture Organization of the United Nations
_c1994
300 _a173p.
650 _aAgriculture
852 _a5R-4-4
999 _c4594
_d4594