Michaud, Jean. 2013. “French Military Ethnography in Colonial Upper Tonkin (northern Vietnam), 1897–1904”. Journal of Vietnamese Studies 8 (4). University of California Press: 1–46. doi:10.1525/vs.2014.8.4.1.

http://www.jstor.org/stable/10.1525/vs.2014.8.4.1?seq=1#page_scan_tab_contents