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|a Sistema Bibliotecario Universidad de El Salvador
|b spa
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| 094 |
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|a Lic. Qca.
|b C-1
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1 |
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|a Calderon, Gloria Ruth,
|e autor
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| 245 |
1 |
1 |
|a Evaluación del poder residual de dos tipos de insecticidas aplicados a cultivos de maíz /
|c presentado por, Gloria Ruth Calderon.
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| 260 |
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|a San Salvador :
|b U.E.S,
|c 1971
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|a 74 h.:
|c 27 cm.
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| 502 |
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|a Tesis (Licenciatura en Química Biológica)--Universidad de El Salvador, San Salvador, 1971.
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| 592 |
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|a Insecticidas según su forma de acción en insectos y plantas -- Insecticidas de contacto -- Insecticidas sistemáticas -- Depósitos y residuos
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