DSpace Collection: http://repositoriodigital.ipn.mx/handle/123456789/19040 Mon, 20 Apr 2026 12:18:45 GMT 2026-04-20T12:18:45Z POI http://repositoriodigital.ipn.mx/handle/123456789/19390 Title: POI Authors: POI Tue, 08 Jul 2014 00:00:00 GMT http://repositoriodigital.ipn.mx/handle/123456789/19390 2014-07-08T00:00:00Z ENCB http://repositoriodigital.ipn.mx/handle/123456789/19389 Title: ENCB Authors: ENCB Tue, 08 Jul 2014 00:00:00 GMT http://repositoriodigital.ipn.mx/handle/123456789/19389 2014-07-08T00:00:00Z