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koreascience.or.krkoreascience.or.kr/article/JAKO199718718229142.pdf · Created Date: 7/5/2006 5:50:43 PM

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Page 1: koreascience.or.krkoreascience.or.kr/article/JAKO199718718229142.pdf · Created Date: 7/5/2006 5:50:43 PM
Page 2: koreascience.or.krkoreascience.or.kr/article/JAKO199718718229142.pdf · Created Date: 7/5/2006 5:50:43 PM
Page 3: koreascience.or.krkoreascience.or.kr/article/JAKO199718718229142.pdf · Created Date: 7/5/2006 5:50:43 PM
Page 4: koreascience.or.krkoreascience.or.kr/article/JAKO199718718229142.pdf · Created Date: 7/5/2006 5:50:43 PM
Page 5: koreascience.or.krkoreascience.or.kr/article/JAKO199718718229142.pdf · Created Date: 7/5/2006 5:50:43 PM
Page 6: koreascience.or.krkoreascience.or.kr/article/JAKO199718718229142.pdf · Created Date: 7/5/2006 5:50:43 PM
Page 7: koreascience.or.krkoreascience.or.kr/article/JAKO199718718229142.pdf · Created Date: 7/5/2006 5:50:43 PM
Page 8: koreascience.or.krkoreascience.or.kr/article/JAKO199718718229142.pdf · Created Date: 7/5/2006 5:50:43 PM
Page 9: koreascience.or.krkoreascience.or.kr/article/JAKO199718718229142.pdf · Created Date: 7/5/2006 5:50:43 PM
Page 10: koreascience.or.krkoreascience.or.kr/article/JAKO199718718229142.pdf · Created Date: 7/5/2006 5:50:43 PM
Page 11: koreascience.or.krkoreascience.or.kr/article/JAKO199718718229142.pdf · Created Date: 7/5/2006 5:50:43 PM
Page 12: koreascience.or.krkoreascience.or.kr/article/JAKO199718718229142.pdf · Created Date: 7/5/2006 5:50:43 PM
Page 13: koreascience.or.krkoreascience.or.kr/article/JAKO199718718229142.pdf · Created Date: 7/5/2006 5:50:43 PM