https://catalogobiblioteca.ingemmet.gob.pe/cgi-bin/koha/opac-search.pl?idx=an%2Cphr&q=42%26limit%3Dau%3ASinger%2C%20Donald%20A.%26limit%3Dsu-to%3AMODELOS%20GENETICOS%26limit%3Dsu-to%3AGEOLOGIA%20ECONOMICA&format=rss2 Search results for 'an,phr: 42&limit=au:Singer, Donald A.&limit=su-to:MODELOS GENETICOS&limit=su-to:GEOLOGIA ECONOMICA' at Biblioteca - Ingemmet 0 20