http://bkds.ustb.edu.cn/ Journal of University of Science and Technology Beijing ( Social Sciences Edition) en 1008-2689 http://bkds.ustb.edu.cn/article/id/5e6eaa2f-a013-4b23-b226-f30bcf9a43ca Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 2002 18(3): 1-5. article doi: ljj雷竞技下载学报社科版 18 3 http://bkds.ustb.edu.cn/article/id/5e6eaa2f-a013-4b23-b226-f30bcf9a43ca 1 http://bkds.ustb.edu.cn/article/id/286f4639-9dae-436c-b529-e78de6822eee Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 2002 18(3): 6-10. article doi: ljj雷竞技下载学报社科版 18 3 http://bkds.ustb.edu.cn/article/id/286f4639-9dae-436c-b529-e78de6822eee 6 http://bkds.ustb.edu.cn/article/id/687adc8f-b81d-4a70-a65c-17d3b3c17c3c Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 2002 18(3): 11-14. article doi: ljj雷竞技下载学报社科版 18 3 http://bkds.ustb.edu.cn/article/id/687adc8f-b81d-4a70-a65c-17d3b3c17c3c 11 http://bkds.ustb.edu.cn/article/id/50599523-f902-4098-8d45-d00521ef3b34 Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 2002 18(3): 15-18. article doi: ljj雷竞技下载学报社科版 18 3 http://bkds.ustb.edu.cn/article/id/50599523-f902-4098-8d45-d00521ef3b34 15 http://bkds.ustb.edu.cn/article/id/a7d76b99-f80e-4f60-808b-2c54b7a70b96 Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 2002 18(3): 19-22,30. article doi: ljj雷竞技下载学报社科版 18 3 http://bkds.ustb.edu.cn/article/id/a7d76b99-f80e-4f60-808b-2c54b7a70b96 19 http://bkds.ustb.edu.cn/article/id/037d038d-9dda-4399-ae99-c10bbbc11721 Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 2002 18(3): 23-25. article doi: ljj雷竞技下载学报社科版 18 3 http://bkds.ustb.edu.cn/article/id/037d038d-9dda-4399-ae99-c10bbbc11721 23 http://bkds.ustb.edu.cn/article/id/345e7bf9-aee6-4c25-af0e-c9fad65710cb Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 2002 18(3): 26-30. article doi: 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