https://biblioteca.ugb.edu.sv/cgi-bin/koha/opac-search.pl?q=ccl=Provider%3AUniversidad%20Gerardo%20Barrios%20and%20au%3AHern%C3%83%C2%A1ndez%2C%20Henry%20Edward%20and%20itype%3AVM%20and%20holdingbranch%3AUSU%20and%20su-to%3AMATERIAL%20AUDIO-VISUAL%20and%20holdingbranch%3AUSU%20and%20su-to%3APEQUE%C3%AF%C2%BF%C2%BD%C3%AF%C2%BF%C2%BDA%20Y%20MEDIANA%20EMPRESA&format=rss2 Search results for 'Provider:Universidad Gerardo Barrios and au:Hernández, Henry Edward and itype:VM and holdingbranch:USU and su-to:MATERIAL AUDIO-VISUAL and holdingbranch:USU and su-to:PEQUE��A Y MEDIANA EMPRESA' at Biblioteca UGB 0 20