http://koha.unicoc.edu.co/cgi-bin/koha/opac-search.pl?q=ccl=au%3A%22P%C3%A9rez%20Torres%2C%20Hern%C3%A1n%22%20and%20available&format=rss2 Search results for 'au:"Pérez Torres, Hernán" and available' at SIBU - SISTEMAS DE BIBLIOTECAS UNICOC 0 20