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Maps from the Treaty Ports of China and Japan - Perry-Castañeda Map Collection - Historical - UT Library Online
MIT Visualizing Cultures
Foreigners Knocking on the Door: Trade in China During the Treaty Port Era
Foreign treaty ports and enclaves in China
The legacy of nineteenth century treaties on the current trade of Chinese cities
File:1899 United States Government Commercial map of China, showing treaty ports, ports of foreign control, railways, telegraphs, waterways.jpg - Wikimedia Commons
Foreign Office Imperialism: China's treaty ports and the British Foreign Office
THE LEGACIES OF FORCED FREEDOM: CHINA'S TREATY PORTS