京津冀城市群经济联系强度分析——基于引力模型

Publisher: 国家哲学社会科学学术期刊数据库

E-ISSN: 1005-913x|volume|4|46-47

ISSN: 1005-913x

Source: 北方经贸, Vol.volume, Iss.4, 2016-01, pp. : 46-47

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Abstract