 [Letter addressed to Prof. Chae-Sin Yu from Yanbian University to invite him as a guest lecturer/researcher] (0) + - [Letter addressed to Prof. Chai-shin Yu from the University of Toronto about the Advisory Council on Korean Studies] (0) + - [Letter addressed to Prof. Chai-shin Yu from the University of Toronto] (0) + - [Letter addressed to Prof. Yu from Wendy Earl to appreciate for his attendance on the 000th Year commemoration event for her grandfather, James Scarth Gale, dispatched to Korea as a Canadian missionary] 