1. 학술연구정보서비스 http://riss4u.net
2. 국회전자도서관 https://u-lib.nanet.go.kr/dl/SearchIndex.php?groupList=ALL&submitFrom=S
http://www.nanet.go.kr/main.jsp
3. 한국학술정보 http://kiss.kstudy.com
4. 국립중앙도서관 http://nl.go.kr
5. 한국학술원 http://www.earticle.net/
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