Lạng Sơn province (English Wikipedia)

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Biểu số 4.1: Hiện trạng sử dụng đất vùng Trung du và miền núi phía Bắc năm 2022 [Table 4.1: Current land use status in the Northern Midlands and Mountains in 2022] (PDF) (Decision 3048/QĐ-BTNMT) (in Vietnamese). Ministry of Natural Resources and Environment (Vietnam). 18 October 2023. – the data in the report are in hectares, rounded to integers

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"Filed Guide to Vietnam:Limestone Forest: Beyond Stunning Beauty" (PDF). Asia Forest Network. pp. 5, 16. Archived from the original (PDF) on 2008-08-28. Retrieved 2010-08-26.
"Number of cooperatives in 2008 by kind of activity and by province: Agriculture, Forestry and Fishery". Population and Employment :General Statistics Office of the Government of Vietnam. Archived from the original on 2009-11-13. Retrieved 2010-06-23.
"Agriculture, Forestry and Fishery: Number of cooperatives by province". Population and Employment :General Statistics Office of the Government of Vietnam. Archived from the original on 2009-11-13. Retrieved 2010-06-23.
"Agriculture, Forestry and Fishery: Number of farms by province". Population and Employment :General Statistics Office of the Government of Vietnam. Archived from the original on 2009-11-13. Retrieved 2010-06-23.
"Agriculture, Forestry and Fishery :Output value of agriculture at constant 1994 prices". Population and Employment :General Statistics Office of the Government of Vietnam. Archived from the original on 2009-11-13. Retrieved 2010-06-23.