The President's work, published on May 3 and Nov. 3, Juche 61 (1972) clarifies the three principles of national reunification--independence, great national unity and peaceful reunification--and the idea of realizing cooperation between the north and the south of Korea.

The leader's work, published on May 5, Juche 80 (1991), deals with the inevitability of victory of socialism and the secret of solidity and invincibility of Korean socialism. It also comprehensively expounds that Korean socialism embodies the great Juche idea and it is the best socialist system providing the popular masses with an independent and creative life.