<![CDATA[SISTEMA DE BIBLIOTECAS EPN - Search for 'su:"ECONOMIA DE HIDROCARBUROS" and au:Ushiña Puma, Angel Fernando and au:Ushiña Puma Ángel, Fernando']]> https://biblioteca.epn.edu.ec/cgi-bin/koha/opac-search.pl?q=ccl=su%3A%22ECONOMIA%20DE%20HIDROCARBUROS%22%20and%20au%3AUshi%C3%B1a%20Puma%2C%20Angel%20Fernando%20and%20au%3AUshi%C3%B1a%20Puma%20%C3%81ngel%2C%20Fernando&format=rss2 6 0 50