000 00449nas a2200169 i 4500
001 2000000158
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007 t
008 030509d esp 0 0spa d
022 _a0199-9060
245 0 0 _aSoil and Water Conservation News
260 0 0 _aWashington
_bUSDA, Soil Conservation Service
310 _a6 núms./año
653 _aCiencia del suelo
999 _c10969
_d10969
505 0 _aSIA ; 1991(i) ; 1992.