/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: MaraMartnez18 https://cdn.slidesharecdn.com/profile-photo-MaraMartnez18-48x48.jpg?cb=1523256690 'La tarea debe hacerse difícil, pues sólo la dificultad inspira a los nobles de corazón.' Søren Kierkegaard.