Hien , Truong Quang, Ma Cai Xue, and He Li Yuan. “Determining the Techniques of Surveying and Cadastral Mapping in Vietnam ”. Modern Advances in Geography, Environment and Earth Sciences Vol. 7 (November 29, 2021): 69–81. Accessed June 19, 2026. https://stm.bookpi.org/MAGEES-V7/article/view/5096.