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<![CDATA[Biblioteca Univ. Surcolombiana Search for 'au:"Escobar Macualo, Freddy Humberto," and su-to:IngenierÃa de petrÃ³leos and holdingbranch:80']]> https://biblioteca.usco.edu.co//cgi-bin/koha/opac-search.pl?q=ccl=au%3A%22Escobar%20Macualo%2C%20Freddy%20Humberto%2C%22%20and%20su-to%3AIngenier%C3%83%C2%ADa%20de%20petr%C3%83%C2%B3leos%20and%20holdingbranch%3A80&format=rss2 0 20