<![CDATA[Biblioteca Universidad de América Search for 'au:Popper, Karl, and au:Popper, Karl,']]> http://biblos.uamerica.edu.co/cgi-bin/koha/opac-search.pl?q=ccl=au%3APopper%2C%20Karl%2C%20%20and%20au%3APopper%2C%20Karl%2C&format=rss2 4 0 20