http://opac.ua.pt/cgi-bin/koha/opac-search.pl?&limit=mc-ccode%3A%27%27%27%27%27%27%27%27%27%27MDF%27%27%27%27%27%27%27%27%27%27&limit=available&limit=au%3ABach%2C%20Johann%20Sebastian%2C&limit=au%3AJ%C3%83%C2%BCrgens%2C%20J%C3%83%C2%BCrgen%2C&format=rss2 Search results with limit(s): 'mc-ccode:''''''''''MDF'''''''''' au:Bach, Johann Sebastian, au:Jürgens, Jürgen,' at Bibliotecas UA 0 20