https://catalogobiblioteca.ingemmet.gob.pe/cgi-bin/koha/opac-search.pl?q=ccl=se%2Cphr%3A%22INGEMMET.%20Bolet%C3%83%C2%ADn.%20Serie%20%20D%3A%20Estudios%20Regionales%22%20and%20au%3ACcallo%20Morocco%2C%20Walter%20Edmundo%20and%20su-to%3AGEOCRONOLOGIA&format=rss2 Search results for 'se,phr:"INGEMMET. Boletín. Serie D: Estudios Regionales" and au:Ccallo Morocco, Walter Edmundo and su-to:GEOCRONOLOGIA' at Biblioteca - Ingemmet 0 20