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<![CDATA[Biblioteca Univ. Surcolombiana Search for 'au:"GutiÃ©rrez VÃ¡zquez, Angel " and au:Spiegel, Murray R.']]> https://biblioteca.usco.edu.co//cgi-bin/koha/opac-search.pl?q=ccl=au%3A%22Guti%C3%83%C2%A9rrez%20V%C3%83%C2%A1zquez%2C%20Angel%20%22%20and%20au%3ASpiegel%2C%20Murray%20R.&format=rss2 0 20