https://catalogobiblioteca.ingemmet.gob.pe/cgi-bin/koha/opac-search.pl?idx=an%2Cphr&q=42%26limit%3Dsu-geo%3APERU%26limit%3Dau%3ATosdal%2C%20Richard%20M.%26limit%3Dsu-to%3AMINERALIZACION&format=rss2 Search results for 'an,phr: 42&limit=su-geo:PERU&limit=au:Tosdal, Richard M.&limit=su-to:MINERALIZACION' at Biblioteca - Ingemmet 0 20