Le, Nang, Oanh Pham, and Man Ho. “Research Gemology and Mineralogy Characteristics of Tektite in North Region of Da Lat City”. Science and Technology Development Journal 20, no. K4 (July 31, 2017): 84-90. Accessed July 22, 2024. https://stdj.scienceandtechnology.com.vn/index.php/stdj/article/view/1122.