<![CDATA[Biblioteca Jorge Álvarez Lleras Search for 'su:"CONCRETO" and au:Nilson, Arthur H and su-to:ESTRUCTURAS DE CONCRETO and su-to:CONSTRUCCIONES DE CONCRETO PRETENSADO']]> https://catalogo.escuelaing.edu.co/cgi-bin/koha/opac-search.pl?q=ccl=su%3A%22CONCRETO%22%20and%20au%3ANilson%2C%20Arthur%20H%20and%20su-to%3AESTRUCTURAS%20DE%20CONCRETO%20and%20su-to%3ACONSTRUCCIONES%20DE%20CONCRETO%20PRETENSADO&format=rss2 4 0 50