基于"点-轴系统"理论的京津冀地区旅游地系统空间结构演变研究
기우"점-축계통"이론적경진기지구여유지계통공간결구연변연구
A Study on the Evolement of Tourist System Spatial Structure Based on the Pole-axis Theory in Beijing,Tianjin and Hebei Province
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