Liu, Xinru and Lynda Norene Shaffer. Connections Across Eurasia: Transportation, Communication, and Cultural Exchange on the Silk Roads.

Strangeman, C. C. (2008). Liu, Xinru and Lynda Norene Shaffer. Connections Across Eurasia: Transportation, Communication, and Cultural Exchange on the Silk Roads. World History Connected, 5(2). https://doi.org/10.13021/whc.v5i2.4911