京津冀城市群空间经济联系研究——基于修正引力模型

Publisher: 国家哲学社会科学学术期刊数据库

E-ISSN: 1009-2692|18|6|80-87

ISSN: 1009-2692

Source: 燕山大学学报:哲学社会科学版, Vol.18, Iss.6, 2017-01, pp. : 80-87

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Abstract