Look at the "North Korea References held at GRC" section under "General Reference" tab.
More Open Access References:
China-North Korea relations : between development and security by 
Crisis in a Divided Korea: a Chronology and Reference Guide by 
Historical Dictionary of Democratic People's Republic of Korea by 
North Korea and Economic Integration in East Asia by 
Origins of the North Korean Garrison State by 
Shield of the Great Leader: The Armed Forces of North Korea by 
In Order to Live: a North Korean girl's journey to freedom by 
Nothing to envy : ordinary lives in North Korea by Look at the "North Korea Film /Media" section under "Film" tab.
Look at the "Literature" tab for more information about North Korean literatures.
GW log-in is required to access these databases.
There are other US presidential libraries that have Korea related primary documents. Those interested are encouraged to check the websites of other presidential libraries (i.e Truman, Eisenhower, Kennedy, Ford, Nixon, Carter, Reagan, George H.W. Bush).
통일부 Ministry of Unification / [English]
통일부 북한자료센터 Information Center on North Korea
통일부 남북회담 본부 The South-North Dialogue
이산가족 종합정보센타 Integrated Information Center for Separated Families
연세대학교 통일연구소 Yonsei University's Institute for Korean Unification Studies / [English]
이화여자대학교 통일연구원 Ehwa Institute of Unification Studies
북한연구소 Institute of North Korean Studies
통일연구원 KINU Korea Institute for National Unification / [English]
평화문제연구소 The institute for peace affairs
아산 정책 연구뭔 The Asan Institute for Policy Studies / [English]
극동문제연구소 The Institute for Far Eastern Studies Kyungnam University / [English]
북한대학원대학교 심연북한연구소 The Simyeon Institute for North Korean Studies / [English]
