https://biblioteca.ugb.edu.sv/cgi-bin/koha/opac-search.pl?q=ccl=Provider%3AUniversidad%20Gerardo%20Barrios%20and%20holdingbranch%3AUSU%20and%20location%3ACART%20and%20holdingbranch%3AUSU%20and%20au%3AVillatoro%20Umanzor%2C%20Jos%C3%83%C2%A9%20Roberto&format=rss2 Search results for 'Provider:Universidad Gerardo Barrios and holdingbranch:USU and location:CART and holdingbranch:USU and au:Villatoro Umanzor, José Roberto' at Biblioteca UGB 0 20