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  1. 1
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    Por una tierra habitable /

    Published 1973
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    Unknown

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  2. 2
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    Las Plantas y el ecosistema / by Billings, W. D.

    Published 1966
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    Unknown

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  3. 3
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    Ideas fundementales en la enseñanza de las ciencias / by Tisher,R.P

    Published 1980
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    Unknown

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  4. 4
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    La aplicaciòn del reglamento especial en materia de sustancias, residuos y desechos peligrosos en El Salvador en relaciòn al medio ambiente y salud humana. / by Chiguila Zepeda, Salvador Guillermo

    Published 2010
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    Thesis

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  5. 5
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    La Ley del Medio Ambiente frente a la contaminaciòn urbana del aire producida por emisiones vehiculares / by Miranda Medina, Salvador Alberto

    Published 2013
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    Thesis Book

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  6. 6
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    La objetividad de los estudios de Impacto Ambiental en los Proyectos de Vivienda Macro en el departamento de Santa Ana / by Aguirre Rivas, Carlos Eduardo

    Published 2012
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    Thesis Book

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  7. 7
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    Gestiòn Ambiental Pùblica / by Barrera Nàjera, Yesenia Liseth

    Published 2015
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    Thesis Book

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  8. 8
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    El Cambio Global: Medio Ambiente y Sociedad / by Kondratyev, K. Ya

    Published 1994
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    Book

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