http://catalogo.umet.edu.ar/cgi-bin/koha/opac-search.pl?q=ccl=an%3A8639%20_dsc%20and%20au%3ALeff%20Zimermann%2C%20Enrique%201946-&format=rss2 Search results for 'an:8639 _dsc and au:Leff Zimermann, Enrique 1946-' at Catalogo de las Biblioteca UMET - ISO y CITRA (CONICET) 0 20