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WikiPedia: Bắc phạt (1926–1928) http://www.gzwh.gov.cn/whw/channel/ztlm/zgsd/3d/ph... //www.worldcat.org/oclc/222139243 //www.worldcat.org/oclc/59836788 http://museum.mnd.gov.tw/English/index.aspx http://www.mnd.gov.tw/English/ https://books.google.com/books?id=2RHIAeZEYjIC https://books.google.com/books?id=BPG7CwAAQBAJ https://books.google.com/books?id=DUg2KGMQWHQC https://books.google.com/books?id=FdW0AAAAIAAJ https://books.google.com/books?id=OF9h6b8tc6UC