https://www.calameo.com/books/002453268554df9da1692
https://www.google.com/url?sa=i&source=images&cd=&ved=2ahUKEwiatvb3lO_kAhXQDGMBHajYC1EQjRx6BAgBEAQ&url=https%3A%2F%2Fes.slideshare.net%2Ffebrittoth1972%2Fepocas-literarias&psig=AOvVaw1UhiC9HC9g-rZ5o67UpFME&ust=1569610497760734
