Nguyen, N., Tran, T. and Ha, H. (2011) “ASSESSING THE SITUATION AND PROPOSING THE SOLUTIONS TO MANAGE AND CONSERVE GEOSITES IN HA TIEN-KIEN LUONG AREA”, Science and Technology Development Journal, 14(4), pp. 62-74. doi: https://doi.org/10.32508/stdj.v14i4.2020.