<![CDATA[Biblioteca Jorge Álvarez Lleras Search for 'an:"30515" and au:Chaparro Aguilar, Raúl Alfredo and su-to:SISTEMAS FORMALES']]> https://catalogo.escuelaing.edu.co/cgi-bin/koha/opac-search.pl?q=ccl=an%3A%2230515%22%20and%20au%3AChaparro%20Aguilar%2C%20Ra%C3%83%C2%BAl%20Alfredo%20and%20su-to%3ASISTEMAS%20FORMALES&format=rss2 0 20