Quang Chon Nguyen, Van Cuong Dinh and Minh Ngoc Truong 2020. Surface charge characteristics of a variable charge soil (Rhodic Ferralsols) in the Central Highlands. Vietnam Journal of Science, Technology and Engineering. 62, 2 (Jun. 2020), 65-70. DOI:https://doi.org/10.31276/VJSTE.62(2).65-70.