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|a Sistema Bibliotecario Universidad de El Salvador
|c SV-SsUSB
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|a spa
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| 094 |
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|a Ing. Civil
|b R-9
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1 |
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|a Rivera Calvo, Mario
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| 245 |
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|a "Lagunas de oxidación, un medio efectivo y económico de autopurificación natural para aguas negras" /
|c Mario Rivera Calvo
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| 260 |
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|a San Salvador :
|b U.E.S.,
|c 1967
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| 300 |
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|a 153[3] h. ;
|c 27 cm.
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| 502 |
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|a Tesis (Ingeniería Civil)--Universidad de El Salvador, San Salvador, 1967.
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| 504 |
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|a Incluye bibliografía.
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| 592 |
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|a División geomorfológica del territorio nacional -- Principios de oxidación biológica -- Teoría general del proceso -- Factores que afectan el proceso -- Diseño -- Operación de mantenimiento
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1 |
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|a Baños Pacheco, Roberto.
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