http://www.dspace.espol.edu.ec/handle/123456789/517 Wed, 06 May 2026 02:45:56 GMT 2026-05-06T02:45:56Z http://www.dspace.espol.edu.ec/handle/123456789/5855 Exámenes de química general i Icq Tue, 07 Jul 2009 00:00:00 GMT http://www.dspace.espol.edu.ec/handle/123456789/5855 2009-07-07T00:00:00Z http://www.dspace.espol.edu.ec/handle/123456789/5376 Química, la ciencia central [inglés] Brown; Lemay; Bursten Sun, 21 Jun 2009 00:00:00 GMT http://www.dspace.espol.edu.ec/handle/123456789/5376 2009-06-21T00:00:00Z