http://koha.unicoc.edu.co/cgi-bin/koha/opac-search.pl?q=ccl=%28su%3A%7BDerecho%20fiscal%7D%29%20AND%20%28su%3A%7BColombia%7D%29%20and%20au%3AInsignares%20G%C3%B3mez%2C%20Roberto%20Carlos%20and%20available&format=rss2 Search results for '(su:{Derecho fiscal}) AND (su:{Colombia}) and au:Insignares Gómez, Roberto Carlos and available' at SIBU - SISTEMAS DE BIBLIOTECAS UNICOC 0 20