https://catalogobiblioteca.ingemmet.gob.pe/cgi-bin/koha/opac-search.pl?q=ccl=an%3A931%20and%20au%3ADur%C3%83%C2%A1n%20Valsero%2C%20Juan%20Jos%C3%83%C2%A9&format=rss2 Search results for 'an:931 and au:Durán Valsero, Juan José' at Biblioteca - Ingemmet 0 20