User:Donald Trung/Hoàng Sa under Nguyễn dynasty rule

Sources to use

 * https://gallica.bnf.fr/ark:/12148/bpt6k14162370/f2.item.r=L'occupation%20des%20%C3%AEles%20Paracels%20'.zoom
 * https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&version=1.2&collapsing=disabled&query=%28gallica%20all%20%22L%27occupation%20des%20%C3%AEles%20Paracels%20%27%22%29%20and%20arkPress%20all%20%22cb32765316h_date%22&rk=64378;0
 * https://gallica.bnf.fr/services/engine/search/sru?operation=searchRetrieve&version=1.2&query=%28gallica%20all%20%22L%27occupation%20des%20%C3%AEles%20Paracels%20%27%22%29&lang=en&suggest=0


 * https://gallica.bnf.fr/ark:/12148/bpt6k6328098p/f27.image.r=L'occupation%20des%20%C3%AEles%20Paracels%20'?rk=42918;4


 * https://archives.org.vn/gioi-thieu-tai-lieu-nghiep-vu/cuu-ho-cuu-nan-tren-bien-thoi-nguyen.htm


 * http://tapchiqptd.vn/vi/bien-dao-viet-nam/tuyen-bo-cairo-nam-1943-va-chu-quyen-cua-viet-nam-doi-voi-quan-dao-hoang-sa-truong-sa/7147.html

Vietnamese-language Wikipedia version

 * https://vi.wikipedia.org/wiki/Ho%C3%A0ng_Sa_th%E1%BB%9Di_nh%C3%A0_Nguy%E1%BB%85n