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Skin Rafts and Camel Caravans: Trade Patterns and Regional Economic Integration in Modern Northwest China—A Discussion on the Concept of the ‘Six Northwestern Provinces’ During the Republic of China
Zhang Ping, Liu Xiaohan
Historical Geography Research . 2026, (1): 73 -88 .  DOI: 10.20166/j.issn.2096-6822.L20250500