Korean Philately Vol 17-20 Korean Philately Vol XVII No. 1 (May 1968) Korean Philately Vol XVII No. 2 (May 1968) Korean Philately Vol XVII No. 3 (August 1968) Korean Philately Vol XVII No. 4 (November 1968) (note: photocopy, not original) Korean Philately Vol XVIII No. 1 (May 1969) Korean Philately Vol XVIII No. 2 (May 1969) Korean Philately Vol XVIII No. 3 (August 1969) Korean Philately Vol XVIII No. 4 (November 1969) Korean Philately Vol XIX No. 1 (February 1970) Korean Philately Vol XIX No. 2 (May 1970) Korean Philately Vol XIX No. 3 (August 1970) Korean Philately Vol XIX No. 4 (November 1970) Korean Philately Vol XX No. 1 (February 1971) Korean Philately Vol XX No. 2 (May 1971) Korean Philately Vol XX No. 3 (August 1971) Korean Philately Vol XX No. 4 (November 1971)
