https://catalogobiblioteca.ingemmet.gob.pe/cgi-bin/koha/opac-search.pl?q=ccl=an%3A41987%20and%20au%3AVargas%20Gonzales%2C%20Christian&format=rss2 Search results for 'an:41987 and au:Vargas Gonzales, Christian' at Biblioteca - Ingemmet 0 20