Bùi, Đông 2024. THE GEOHERITAGE VALUES OF BAN BU CAVES SYSTEM, NGOC LAC, THANH HOA IN TOURISM DEVELOPMENT. VNUHCM Journal of Natural Sciences. 7, S1 (Dec. 2024), 125-135. DOI:https://doi.org/https://doi.org/10.32508/stdjns.v7iS1.1375.