아버지 고향이 함경북도였고 그 역시 북간도와 한국을 오가며 보고 들은 게 많았기에 논문을 쓰는 데 문제가 없을 거라 생각했다.
My father's hometown was North Hamgyong, and he also saw and heard many things going back and forth Manchuria and korea, so I thought there would be no problem in writing a thesis.