According to Center for Nonproliferation Studies. "Country Overviews: North Korea". Archived from the original on 2007-10-13. Retrieved 2006-09-30., which cites a 1998 work by Lee Chae Sŭng. However, Naver asserts that he held that position from 1961 to 1986.
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According to Center for Nonproliferation Studies. "Country Overviews: North Korea". Archived from the original on 2007-10-13. Retrieved 2006-09-30., which cites a 1998 work by Lee Chae Sŭng. However, Naver asserts that he held that position from 1961 to 1986.
