/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: CarlosCastellanosCortazar https://cdn.slidesharecdn.com/profile-photo-CarlosCastellanosCortazar-48x48.jpg?cb=1523346435 "Si avanzo sígueme, si me detengo empújame, si retrocedo mátame"....Ernesto Guevara de la Serna