TY - Journal of Guizhou University of Finance and Economics A1 - LU Fei, LIU Ming-hui T1 - Research on agglomeration of producer services Threshold and manufacturing upgrading - based on triple effect of the cluster Y1 - 2016-07-15 JF - Journal of Guizhou University of Finance and Economics JO - Journal of Guizhou University of Finance and Economics SP - 24 EP - 35 VL - 34 IS - 04 UR - https://gcxb.gufe.edu.cn N1 - ER -