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PreviewIssue DateTitleAuthor(s)
REXTN-Un21.pdf.jpgDec-2014Universitas vol 12 - No. 21 . REVISTA COMPLETAUniversidad Politécnica Salesiana del Ecuador (UPS)
REXTN-Un27.pdf.jpgSep-2017Universitas vol 15 - No. 27 . REVISTA COMPLETAUniversidad Politécnica Salesiana del Ecuador (UPS)
REXTN-Un28.pdf.jpgAug-2018Universitas vol 16 - No. 28 . REVISTA COMPLETAUniversidad Politécnica Salesiana del Ecuador (UPS)