<![CDATA[Biblioteca Jorge Álvarez Lleras Search for 'su:"Estructuras de concreto" and au:Nilson, Arthur H']]> https://catalogo.escuelaing.edu.co/cgi-bin/koha/opac-search.pl?q=ccl=su%3A%22Estructuras%20de%20concreto%22%20and%20au%3ANilson%2C%20Arthur%20H&format=rss2 8 0 50