Hung, Van, 		Thi Minh Nguyet, Vu, 		Van Quynh, Bui, AND 		Tung Lam, Ha.
" Application of Principal Component Analysis  in Determining the Hydrogeochemistry Characteristics  of Karst Water in Bac Kan and Cao Bang" <em>VNU Journal of Science: Earth and Environmental Sciences</em> [Online], Volume 40 Number 2 (29 May 2024)