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00805nam a2200301 i 4500 |
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| 040 |
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|a Universidad Nacional Agraria
|b spa
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|a Castañeda Samayoa, O.R.
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|a Transición de la agricultura convencional a la agricultura orgánica: el proceso, costos y consecuencias
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| 773 |
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|t Memoria
|d San José (Costa Rica) , 1995
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|a p. 351-362
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|a 5 ref.
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|a AGRICULTURA ORGANICA
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