Understanding earth / Frank Press, Raymond Siever https://biblioteca.isel.pt/cgi-bin/koha/opac-shelves.pl?rss=1&viewshelf=972 RSS feed for public list Understanding earth / Frank Press, Raymond Siever Understanding earth by Frank Press, Raymond Siever https://biblioteca.isel.pt/cgi-bin/koha/opac-detail.pl?biblionumber=9787 Understanding earth by Frank Press... [et al.] https://biblioteca.isel.pt/cgi-bin/koha/opac-detail.pl?biblionumber=3810