http://pc.h12o.es/cgi-bin/koha/opac-search.pl?q=ccl=an%3A%221237%22%20and%20au%3ASadia%20P%C3%83%C2%A9rez%2C%20David&format=rss2 Search results for 'an:"1237" and au:Sadia Pérez, David' at 0 20