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|a Universidad Nacional Agraria
|b spa
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| 907 |
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|a P36
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|a M
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| 978 |
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|a GRH
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|a 20-12-1997
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|a EMF
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|a 04/08/2021
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|a DOC
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| 991 |
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|a EMF040821
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| 991 |
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|a ACTUALIZACION DE REGISTRO 1997
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| 035 |
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|a 004634
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| 041 |
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|a eng
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| 092 |
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|a P36 N277
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| 110 |
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|a National Center for Agricultural and Forestry Technology, San Salvador (El Salvador)
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| 245 |
1 |
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|a Report on the first fair on conservation tillage en Guaymango, El Salvador, April 7, 1995
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| 260 |
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|a San Salvador (El salvador) :
|b IICA,
|c 1995
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| 264 |
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|a San Salvador (El salvador) :
|b IICA,
|c 1995
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| 300 |
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|a 14 p.
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| 500 |
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|a Ilus.
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| 650 |
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7 |
|a CONSERVACION DE SUELOS
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| 650 |
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7 |
|a RESIDUOS DE COSECHAS
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| 650 |
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7 |
|a EXHIBICIONES
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| 650 |
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7 |
|a SISTEMAS DE CULTIVO
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| 650 |
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7 |
|a COMUNIDADES RURALES
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| 650 |
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7 |
|a AGRICULTORES
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| 942 |
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|c BK
|2 agris
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| 952 |
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|a 01
|b 01
|8 CG
|c CG
|y BK
|p D1610/97
|o P36 N277
|