http://koha.unicoc.edu.co/cgi-bin/koha/opac-search.pl?q=ccl=%28su%3A%22Contratos%20de%20trabajo%22%29%20AND%20%28su%3A%22Colombia%22%29%20and%20itype%3ALIBROS%20and%20au%3AOrtega%20Torres%2C%20Jorge&format=rss2 Search results for '(su:"Contratos de trabajo") AND (su:"Colombia") and itype:LIBROS and au:Ortega Torres, Jorge' at SIBU - SISTEMAS DE BIBLIOTECAS UNICOC 0 20