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/335c7252-a489-4f4b-b6bd-8eb11147109b Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(4): 1-4. article doi: ljj雷竞技下载学报社科版 15 4 http://bkds.ustb.edu.cn/article/id/335c7252-a489-4f4b-b6bd-8eb11147109b 1 http://bkds.ustb.edu.cn/article/id/3e7b85b0-3c20-4136-997a-50ff98a9c08b Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(4): 5-8. article doi: ljj雷竞技下载学报社科版 15 4 http://bkds.ustb.edu.cn/article/id/3e7b85b0-3c20-4136-997a-50ff98a9c08b 5 http://bkds.ustb.edu.cn/article/id/42525749-8d60-4147-bad0-551979075d0d Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(4): 9-12. article doi: ljj雷竞技下载学报社科版 15 4 http://bkds.ustb.edu.cn/article/id/42525749-8d60-4147-bad0-551979075d0d 9 http://bkds.ustb.edu.cn/article/id/0ebe6593-4e7f-4e60-8db6-d404f5715088 Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(4): 12-12. article doi: ljj雷竞技下载学报社科版 15 4 http://bkds.ustb.edu.cn/article/id/0ebe6593-4e7f-4e60-8db6-d404f5715088 12 http://bkds.ustb.edu.cn/article/id/3cf52a94-56f0-4f45-860c-c5a9803926c2 Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(4): 13-15,54. article doi: ljj雷竞技下载学报社科版 15 4 http://bkds.ustb.edu.cn/article/id/3cf52a94-56f0-4f45-860c-c5a9803926c2 13 http://bkds.ustb.edu.cn/article/id/035ff230-a811-4b8c-8162-e56d637d0a5b Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(4): 16-19. article doi: ljj雷竞技下载学报社科版 15 4 http://bkds.ustb.edu.cn/article/id/035ff230-a811-4b8c-8162-e56d637d0a5b 16 http://bkds.ustb.edu.cn/article/id/948e6779-da18-4585-a2d0-9754a11964b3 Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(4): 19-19. article doi: ljj雷竞技下载学报社科版 15 4 http://bkds.ustb.edu.cn/article/id/948e6779-da18-4585-a2d0-9754a11964b3 19 http://bkds.ustb.edu.cn/article/id/984443bc-b76e-4cef-96b4-92e0c8e9d178 Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(4): 20-23. article doi: ljj雷竞技下载学报社科版 15 4 http://bkds.ustb.edu.cn/article/id/984443bc-b76e-4cef-96b4-92e0c8e9d178 20 http://bkds.ustb.edu.cn/article/id/3cb91448-3b14-4e97-ba0e-4c2a4dbc19d7 Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(4): 24-26. article doi: ljj雷竞技下载学报社科版 15 4 http://bkds.ustb.edu.cn/article/id/3cb91448-3b14-4e97-ba0e-4c2a4dbc19d7 24 http://bkds.ustb.edu.cn/article/id/c19802f0-32c5-4f41-b7e1-850e30cefe14 Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(4): 26-26. article doi: ljj雷竞技下载学报社科版 15 4 http://bkds.ustb.edu.cn/article/id/c19802f0-32c5-4f41-b7e1-850e30cefe14 26 http://bkds.ustb.edu.cn/article/id/550e571a-44ac-4d85-996b-57a9e2ad8143 Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(4): 27-32. article doi: ljj雷竞技下载学报社科版 15 4 http://bkds.ustb.edu.cn/article/id/550e571a-44ac-4d85-996b-57a9e2ad8143 27 http://bkds.ustb.edu.cn/article/id/69cd975d-2e21-467f-9b59-b232f9b905dc Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(4): 32-32. article doi: ljj雷竞技下载学报社科版 15 4 http://bkds.ustb.edu.cn/article/id/69cd975d-2e21-467f-9b59-b232f9b905dc 32 http://bkds.ustb.edu.cn/article/id/38687ca0-5585-4ab2-9ed1-ddb753166c5b Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(4): 33-37,42. article doi: ljj雷竞技下载学报社科版 15 4 http://bkds.ustb.edu.cn/article/id/38687ca0-5585-4ab2-9ed1-ddb753166c5b 33 http://bkds.ustb.edu.cn/article/id/5a2423d7-0703-4b74-a758-b268849ce3b7 Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(4): 38-42. article doi: ljj雷竞技下载学报社科版 15 4 http://bkds.ustb.edu.cn/article/id/5a2423d7-0703-4b74-a758-b268849ce3b7 38 http://bkds.ustb.edu.cn/article/id/2413f3be-187e-40b1-9464-fd93ab65f300 Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(4): 43-47. article doi: ljj雷竞技下载学报社科版 15 4 http://bkds.ustb.edu.cn/article/id/2413f3be-187e-40b1-9464-fd93ab65f300 43 http://bkds.ustb.edu.cn/article/id/e94061b0-ed12-47d2-aef6-7af97d957a32 Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(4): 48-50. article doi: ljj雷竞技下载学报社科版 15 4 http://bkds.ustb.edu.cn/article/id/e94061b0-ed12-47d2-aef6-7af97d957a32 48 http://bkds.ustb.edu.cn/article/id/f73f0da3-0011-46f6-b1a8-2f32209fab1c Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(4): 51-54. article doi: ljj雷竞技下载学报社科版 15 4 http://bkds.ustb.edu.cn/article/id/f73f0da3-0011-46f6-b1a8-2f32209fab1c 51 http://bkds.ustb.edu.cn/article/id/3178f1fe-c6ef-4dab-a09e-c1ecdf821483 Personal use only, all commercial 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