https://www.youtube.com/watch?v=alANNXcPZD4
https://www.youtube.com/watch?v=w3kTP0f1xt0
제4부
https://www.youtube.com/watch?v=1SPF-e1PF4w
https://www.youtube.com/watch?v=nXyH2xSOeD4
출처: https://kydong77.tistory.com/18350?category=874529 [김영동교수의 고전 & Life]
