¹ÚÁÖ¿µÀ¯ÇÐÁ¤º¸
¹Ì±¹ ÃÖ°íÀÇ ¸í¹® ´ëÇÐ ÇÕ°ÝÀ» ÃàÇÏ ÇÕ´Ï´Ù.
Columbia University