https://catalogobiblioteca.ingemmet.gob.pe/cgi-bin/koha/opac-search.pl?q=ccl=an%3A3185%20and%20su-to%3ASEDIMENTOS%20MARINOS%20and%20au%3AVelazco%2C%20Federico&format=rss2 Search results for 'an:3185 and su-to:SEDIMENTOS MARINOS and au:Velazco, Federico' at Biblioteca - Ingemmet 0 20