https://biblioteca.ugb.edu.sv/cgi-bin/koha/opac-search.pl?q=ccl=an%3A%224305%22%20and%20au%3ARivera%20Garciaguirres%2C%20Jos%C3%83%C2%A9%20Roberto%20and%20su-to%3AFORMACION%20PROFESIONAL%20DE%20MAESTROS&format=rss2 Search results for 'an:"4305" and au:Rivera Garciaguirres, José Roberto and su-to:FORMACION PROFESIONAL DE MAESTROS' at Biblioteca UGB 0 20