DSpace Collection: http://repositoriodigital.ipn.mx/handle/123456789/12401 Mon, 20 Apr 2026 12:20:30 GMT 2026-04-20T12:20:30Z Spot6 http://repositoriodigital.ipn.mx/handle/123456789/12407 Title: Spot6 Fri, 01 Feb 2013 00:00:00 GMT http://repositoriodigital.ipn.mx/handle/123456789/12407 2013-02-01T00:00:00Z Spot5 http://repositoriodigital.ipn.mx/handle/123456789/12406 Title: Spot5 Fri, 01 Feb 2013 00:00:00 GMT http://repositoriodigital.ipn.mx/handle/123456789/12406 2013-02-01T00:00:00Z Spot4 http://repositoriodigital.ipn.mx/handle/123456789/12405 Title: Spot4 Fri, 01 Feb 2013 00:00:00 GMT http://repositoriodigital.ipn.mx/handle/123456789/12405 2013-02-01T00:00:00Z Spot3 http://repositoriodigital.ipn.mx/handle/123456789/12404 Title: Spot3 Fri, 01 Feb 2013 00:00:00 GMT http://repositoriodigital.ipn.mx/handle/123456789/12404 2013-02-01T00:00:00Z