Nguyen, Tuan Anh, Chi Cong Duong, Trong Hieu Nguyen, and Trung Thanh Vu. 2013. “TAGS Air III Gravity Meter and Proposal of Procedure of It’s Survey Operation in Vietnam”. Journal of Geodesy and Cartography, no. 18 (December):38-44. https://doi.org/10.54491/jgac.2013.18.90.