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/a5c6721d-5198-453f-9ad5-f12b6eb1a34e Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(2): 1-7. article doi: ljj雷竞技下载学报社科版 15 2 http://bkds.ustb.edu.cn/article/id/a5c6721d-5198-453f-9ad5-f12b6eb1a34e 1 http://bkds.ustb.edu.cn/article/id/536b5375-a89a-4048-a951-d07a85ddc8c9 Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(2): 8-10. article doi: ljj雷竞技下载学报社科版 15 2 http://bkds.ustb.edu.cn/article/id/536b5375-a89a-4048-a951-d07a85ddc8c9 8 http://bkds.ustb.edu.cn/article/id/13f1b123-d201-483b-927b-fc2881444725 Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(2): 11-14. article doi: ljj雷竞技下载学报社科版 15 2 http://bkds.ustb.edu.cn/article/id/13f1b123-d201-483b-927b-fc2881444725 11 http://bkds.ustb.edu.cn/article/id/4e370e1b-8ab0-43ea-a9d6-d25f2572c2c4 Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(2): 15-17. article doi: ljj雷竞技下载学报社科版 15 2 http://bkds.ustb.edu.cn/article/id/4e370e1b-8ab0-43ea-a9d6-d25f2572c2c4 15 http://bkds.ustb.edu.cn/article/id/08170e5a-c9f6-47de-bfc9-b363ea4093fc Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(2): 18-20. article doi: ljj雷竞技下载学报社科版 15 2 http://bkds.ustb.edu.cn/article/id/08170e5a-c9f6-47de-bfc9-b363ea4093fc 18 http://bkds.ustb.edu.cn/article/id/af2c8d0f-de0a-4282-a172-2e5ecfa348f9 Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(2): 21-25. article doi: ljj雷竞技下载学报社科版 15 2 http://bkds.ustb.edu.cn/article/id/af2c8d0f-de0a-4282-a172-2e5ecfa348f9 21 http://bkds.ustb.edu.cn/article/id/e8a78458-c220-472a-ab01-51dca5ed4439 Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(2): 25-25. article doi: ljj雷竞技下载学报社科版 15 2 http://bkds.ustb.edu.cn/article/id/e8a78458-c220-472a-ab01-51dca5ed4439 25 http://bkds.ustb.edu.cn/article/id/ada31726-ec9e-4956-9278-2593fc682d9b Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(2): 26-29. article doi: ljj雷竞技下载学报社科版 15 2 http://bkds.ustb.edu.cn/article/id/ada31726-ec9e-4956-9278-2593fc682d9b 26 http://bkds.ustb.edu.cn/article/id/e3956d93-2c52-4677-8453-8ecb728eab9d Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(2): 30-32. article doi: ljj雷竞技下载学报社科版 15 2 http://bkds.ustb.edu.cn/article/id/e3956d93-2c52-4677-8453-8ecb728eab9d 30 http://bkds.ustb.edu.cn/article/id/10adbb81-6fce-49e6-8ed3-ca46989e2450 Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(2): 33-35. article doi: ljj雷竞技下载学报社科版 15 2 http://bkds.ustb.edu.cn/article/id/10adbb81-6fce-49e6-8ed3-ca46989e2450 33 http://bkds.ustb.edu.cn/article/id/bd73649e-8f65-4b69-afa5-3f4953fec69b Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(2): 36-37. article doi: ljj雷竞技下载学报社科版 15 2 http://bkds.ustb.edu.cn/article/id/bd73649e-8f65-4b69-afa5-3f4953fec69b 36 http://bkds.ustb.edu.cn/article/id/256e0a77-4c11-47e3-bbb3-312ee68c85a0 Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(2): 38-42. article doi: ljj雷竞技下载学报社科版 15 2 http://bkds.ustb.edu.cn/article/id/256e0a77-4c11-47e3-bbb3-312ee68c85a0 38 http://bkds.ustb.edu.cn/article/id/c265bd68-92bc-475d-af7b-54f3c3b9741f Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(2): 43-48. article doi: ljj雷竞技下载学报社科版 15 2 http://bkds.ustb.edu.cn/article/id/c265bd68-92bc-475d-af7b-54f3c3b9741f 43 http://bkds.ustb.edu.cn/article/id/e4d4625d-1738-4cd4-93e1-0ac9c0f0870e Personal use only, all commercial or other reuse prohibited ljj雷竞技下载学报社科版. 1999 15(2): 49-51. article doi: ljj雷竞技下载学报社科版 15 2 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