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四川省第七次全国人口普查公报(第二号) [Seventh National Census of Sichuan Province Report (Number Two)] (in Chinese). Sichuan Provincial Bureau of Statistics. 2021-05-26. Archived from the original on 2021-09-14. Retrieved 2021-09-14.
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(in Chinese)Profile of Ya'an, official website of Ya'an Government, visited on May 12, 2008.
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