http://www.youtube.com/watch?v=92M92wg3qy4&feature=related
http://www.youtube.com/watch?v=tC9Vk_BMxJM&feature=related
http://www.youtube.com/watch?v=pLpeql5MNQU&feature=related
http://www.youtube.com/watch?v=o0YGveKutI0&feature=related
EL dia martes se comentarán en clase....