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Items where Author is "Alas Portillo, Ana Silvia"
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Alas Portillo, Ana Silvia and Mena Domínguez, Waldo Miguel and Vásquez, Marcos Antonio (2002) The academic and non-academic factors related to students' attrition and or subject failing at the Sociology Departament of the School of Arts and Sciences of the University of El Salvador, semester 1-2000. Bachelor thesis, Universidad de El Salvador.